Is there something wrong with this question or is my understanding wrong? The way I understand the question is which item is not an error. And both A and B are correct presentations. C is an incomplete presentation. So the way the question is asked, I cannot see how A is a correct answer.
The answer is worded amazingly poorly, to the point of being incomprehensible. Here’s the scoop:
A is the composite % of firm assets. This is correct.
B is Note 3. B is NOT correct because you need to say that policies for calculating returns are available on request, and it doesn’t mention that. Yes, that is how picky they are being.
C is standard deviation. C is NOT correct because you need to show standard deviation of the benchmark, not just the composite.