Explanation:

The correct answer to the given question is option 'D', which means all of the above. Let us see why all options are correct in this case.

a) With - When we say 'pleased with', it means we are satisfied or happy with something. So, if we say "I am pleased with my exam results", it means we are happy with the outcome of our exams.

b) About - When we say 'pleased about', it means we are happy or excited about something. So, if we say "I am pleased about my exam results", it means we are excited or happy about the result we have achieved.

c) At - When we say 'pleased at', it means we are happy or satisfied with a particular situation or event. So, if we say "I am pleased at my exam results", it means we are satisfied and happy with the outcome of our exams.

Therefore, all the options (with, about, and at) are correct in this case, and the correct answer is option 'D' - all of the above.

Summary:

- The correct answer to the given question is option 'D' - all of the above.
- 'Pleased with', 'pleased about', and 'pleased at' are all correct in this context.
- When we say 'pleased with', it means we are satisfied or happy with something.
- When we say 'pleased about', it means we are happy or excited about something.
- When we say 'pleased at', it means we are happy or satisfied with a particular situation or event.