Question: NAME_1 grows an initial culture of 100 Rhizopus stolonifer fungi on a sample of bread. She wants to model the growth of the fungi according to the exponential equation A = Pe^(rt), where A is the final number of fungi, P is the initial number, r is the growth rate, and t is time elapsed in hours. If after 5 hours she measures the number of fungi to be 750, what is the value of r?
A: 0.403
B: 0.863
C: 2.015
D: 4.317
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option. Provide two versions of response separated with exactly 6 asterisk symbols: ******.
user