You win a prize and are offered two choices: Choice A: $0.10 on January 1, $0.20 on January 2, $0.40 on January 3, $0.80 on January 4, doubling the amount each day, or
Choice B: $5.00 on the first day, $10.00 on the second day, $15.00 on the third day, getting $5.00 more each day.
Which Choice can be defined using an exponential function? What is the function?

A. Choice b At=5.00+5.00(t-1)
B. Choice b, At=5.00+5.00t
C. Choice A, At=0.10(2)^t-1
D. Choice A, At=(0.10)^t-1