A. Unclear
The meaning of the word obtuse in the poem by T.S. Eliot points to a criticism of the personality of J. Alfred Prufrock. It is meant to describe the lack of any useful intellectual activity on this behalf. In this sense, we think of being ´obtuse´ as being unclear because of the nature of useful intellectual activity having a clearly defined purpose. In other words,
B. The benefit lost when choosing between 2 options
I think the answer is B because of the words he and
she
