Your theory is correct. But that leaves us with a) and b).
Between I and me, we can decide like this: I corresponds to we and me corresponds to us. 'He was with us' and not 'He was with we.' So, b) is the correct option.
Your theory is correct. But that leaves us with a) and b).
Between I and me, we can decide like this: I corresponds to we and me corresponds to us. 'He was with us' and not 'He was with we.' So, b) is the correct option.