A. Have carefully considered the important issues raised by
B. We have decided to take the following
C. The report which you sent me and
D. I and my
Explanation
The error is: "I and my"
The correct phrase should be "My colleague and I" or "My colleague and I have" instead of "I and my colleague".
This is because in English, the word "I" should always be placed last in a sentence when used with other subjects, especially when using a conjunction like "and".