Don’t laugh at me.

The correct answer is: Don’t laugh at me.

The other options are incorrect because they do not express the speaker’s desire to not be laughed at.

• Option A, “Let me be laughed at,” is the opposite of what the speaker wants. The speaker does not want to be laughed at, so they would not say “Let me be laughed at.”
• Option B, “Let be me not laughed at,” is grammatically incorrect. The correct way to say this would be “Let me not be laughed at.” However, even if this sentence were grammatically correct, it would still not express the speaker’s desire to not be laughed at. The speaker is not saying “Let me not be laughed at,” they are saying “Don’t laugh at me.”
• Option C, “I am laughed at,” is a statement of fact. The speaker is not stating a fact, they are expressing a desire. The speaker is not saying “I am laughed at,” they are saying “Don’t laugh at me.”

Therefore, the correct answer is: Don’t laugh at me.