A camel is traveling at a constant speed of 3.2 miles per hour as it crosses a desert. Which equation shows the relationship between t, the amount of time the camel has been traveling in hours, and d, the distance the camel has traveled in miles?
A) d = 3.2 + t
B) t = 3.2 + d
C) d = 3.2 × t
D) t = 3.2 × d