Imagine that you have been asked to give a graduation speech. which elements should you avoid when writing the speech?
d
a
strictly formal, argumentative tone
the graduating students' accomplishments
funny quotes from other students
unpleasant remarks about a teacher
simple sentence constructions

i would say i had an amazing four years in high school jokes, field trips, and sports. and i would avoid saying all the negative things just go with the flow

the answer is   c the cold war

one context clue that me find the meaning of luxuriance was that the base word of luxuriance is luxury, so i think that luxuriance means something that is luxury, or something luxurious.