Reference pmbok guide sixth edition page 220 question

Reference: PMBOK Guide - Sixth Edition, page 220.

Question 165 : You have been managing a project to construct an overpass on Interstate
10. You have divided the project into phases to provide better management control. Which
of the following is a characteristic of a project phase?
2. The closure of a phase is required to be approved in some form before it can be
considered closed.
Justification
In many cases, the closure of a phase is required to be approved in some form before it can
be considered closed.
Reference: PMstudy.com comments

Question 166 : As a project manager, you realize that managing project stakeholder
expectations is an important priority. Which statement on project stakeholders is NOT
correct?
1. Negative stakeholders must be ignored if the project has to be successfully
completed.
Justification
In the case of stakeholders with positive expectations for the project, their interests are
best served by making the project successful .... In contrast, the interests of negatively
affected stakeholders are served by impeding the project`s progress. Overlooking negative
stakeholders ’ interest can result in an increased likelihood of failures, delays, or other
negative consequences to the project.
Reference: PMBOK® Guide - Sixth Edition, pages 504-505

Question 167 : You are half way through a 12-month contract on a high-priority project for
your company. The team has been progressing well during execution of the project work.
Some of the deliverables have already been approved by the buyer and they seem to be
happy with the progress so far. Cumulative CPI and SPI are 1.09 and .98, respectively. Your
sponsor comes by your office and you are shocked to hear from her that the buyer has
decided to terminate the contract per the terminations clause and move the work to
another seller. The buyer asks you to work for the new seller. Your next step is to:
2. Execute contract closing procedures
Justification
The buyer has a right to terminate the contract if a termination clause is specified in the
contract. Requirements for procurement closure are defined in the terms and conditions of
the contract.
Options 1 & 4: These options would be considered unethical and may violate confidentiality
agreements you have with your current employer.
Option 3: You should provide all deliverables and documents to the buyer, not the new
seller.
Reference: PMstudy.com comments

Question 168 : In a project life cycle, the least number of conflicts occur over:
4. Costs
Justification
Reference: Project Management - A Systems Approach to Planning, Scheduling and
Controlling, page 302

Question 169 : Your sponsor has asked you to use payback period as a selection criterion
to select amongst 5 competing projects. In this context, which of the following statements
related to payback period is incorrect?
2. Payback period takes the discount rate into account to determine the best possible
option.