Using it's concept, it is found that the desired probability is given as follows:
P(Senior|Spanish) = 39/206, which means that option B is correct.
A probability is given by the number of desired outcomes divided by the number of total outcomes.
In this problem, there are 62 + 58 + 47 + 39 = 206 students taking Spanish, of which 39 are Seniors, hence the probability is given by:
P(Senior|Spanish) = 39/206.
Hence option B is correct.
More can be learned about probabilities at https://brainly.com/question/14398287
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