Final answer:
The value of q is 0.3, option C.
Step-by-step explanation:
The value of q is 0.3, option C. To find the value of q, you divide the number of a alleles by the total number of alleles. In this case, the number of a alleles is 60 and the total number of alleles is 200, so the value of q is 60/200, which simplifies to 0.3.