Here is a situation. There was something bad you need to tell your parents. But, your parents get upset very easily. So, you and your brother decided to take several days to come up with some ideas to tell your parents without causing trouble. So several days have passed, and you ask your brother whether he has some ideas. Even though he had thought of some good ideas, he forgot them totally because he was too busy with another matter. In this case, can he say both the answers below?
A: I thought of some good ideas but I don't remember. I am sorry.
B: I have thought of some good ideas but I don't remember. I am sorry.