B.
Investiture
Tis is blamnk space to fill uap spcae for tis answer to count.
Question 1 answer: The last option
Question 2 answer: Each change of speaker equals a new paragraph.
I would agree with you - the conclusion should leave readers with an important thought at the end.
This thought should never be new, or opposing to the previous ideas you had been writing before. It also shouldn't be confusing, but quite conversely - it should explain everything and put everything in place.