You are both incorrect.
We are not given key determiners in order to come to that conclusion, and as such, we can only make an assumption of their locality in order to arrive at answer A; ergo, answer C is the most applicable. For example; either Anne or George could be photographs, rather than people; or Anne could be looking at George through the window of a passing train. Therefore, the answer “cannot be determined” is the most relevant as the facts we are provided with are far too sparse to arrive at a conclusive response, applying either deductive or modelling reasoning. In the event that A Jack is Married, and B Anne cannot be determined to be married or not, and C George is unmarried - the fact remains that B cannot be determined to be married or not; as an indeterminate variable, she could a) be married when Jack is looking at her and b) be unmarried during the time she is looking at George – we must make the assumption that these people are viewing each other contemporaneously in order to arrive at conclusion A. .