While exploring a volcano, Zane heard some rumbling, so he decided to climb up out of there as quickly as he could.
Zane's elevation relative to the edge of the inside of the volcano (in meters) as a function of time (in seconds) is graphed.
graph

How fast did Zane climb?
Choose 1
Choose 1

(Choice A)
A
\dfrac57
7
5

start fraction, 5, divided by, 7, end fraction meters per second

(Choice B)
B
353535 meters per second

(Choice C)
C
252525 meters per second

(Choice D)
D
\dfrac75
5
7

start fraction, 7, divided by, 5, end fraction meters per second