The premises arent true and the argument is invalid

SHORT ANSWER QUESTION
Why is it hard to settle a debate on a controversial
issue with a simple deductive argument?
MULTIPLE CHOICE QUESTION

Isabelle says, “Since felons in this country are
Americans just like the rest of us, they should be
allowed to vote.” Which of the following represents
the hidden assumption of her enthymeme?
Correct. Isabelle’s unstated premise is that all
Americans should be allowed to vote, creating the
following syllogism:
(Implied) Premise: All Americans are people with the
right to vote. Premise: All felons are Americans.
Conclusion: Therefore, all felons are people with the
right to vote.
SHORT ANSWER QUESTION
When Pedro is making his book pitch to a publisher,
he says, “All the books in my series are about how to
get rich fast. Trust me, they’ll sell like hotcakes.”
What is the hidden assumption in Pedro’s
enthymeme?