Question

A?

Answer 1

sorry for the single colors

Answer 2

trough is the bottom dip of each wave

so I would say the A wave's distance trough to trough is equal to D wave's distance

Answer 3

SO A =)

Answer 4

but... I just said that A's distance is equal to D?

Answer 5

Oops I mean " So D"

Answer 6

Sorry

Answer 7

but...
if D is equal to A...
then neither is longer than the other
they are equal
it can't be D or A

Answer 8

Ugh I'm sorry, i am not reading properly

Answer 9

Would it be b then because that is the longest from trough to trough

Answer 10

I think it's a mean trick question because C's other trough is so far away that it's not even in the picture

Answer 11

So b

Answer 12

I mean thats the only one left

Answer 13

I'm trying to say that C is so long that is goes off the graph

Answer 14

Oh lol, so that would make the answer c because it is the greatest distance

Answer 15

yup