Dothan Inc.'s stock has a 25% chance of producing a 16% return, a 50% chance of producing a 12% return, and a 25% chance of producing a -18% return. What is the firm's expected rate of return? Do not round your intermediate calculations.

a. 4.51%

b. 4.29%

c. 5.50%

d. 4.68%

e. 6.38%