The graph shows susan’s distance from her office, in yards, as she runs errands, over time, in minutes.

for which values of t (time) is susan’s distance from her office decreasing from 70 yd to 0 yd?

a.
from t = 0 to t = 6

b.
from t = 10 to t = 12

c.
from t = 16 to t = 22

d.
from t = 22 to t = 26