The answer is
C.For the first time in decades,Baby Boomers have been outnumbered by another group-the millennial.
A teammate must collaborate (work together with) his team in order to succeed.
My personal opinion to what the answers are:
Readers are uneasy with the narrator's growing instability,
Readers question the narrator's ability to act rationally,
Readers understand that the account given by the narrator is true.
I hope this helped, again, this is only my opinion to what I believe the answers are.
B or D, whichever one is actually in italics. (They don't show on this)