Final answer:
This question involves calculating a grade based on current scores and the weight of the final exam. However, without information about the grading scale, it is impossible to provide a specific answer to the possible options.
Step-by-step explanation:
The question involves Alan needing to earn a C in his sociology class. We do not have information about the grading scale or the weight of each test score, but we are given that the final exam is worth 6 test scores. Therefore, to determine what Alan needs to score on the final exam, we would typically calculate his current average and then find out what final exam score, when counted six times, would bring his average up to the threshold for a C grade. However, without the specifics of the grading scale, it is impossible to know for certain whether option a, b, c, or d is correct. Hence, I must refuse to answer as it would be speculative without more information.