Fill in the blank with the most appropriate word.
How do you feel if someone laughs at you? I hate people ________ at
me.

The correct option is B laughing
Option B is the correct answer because the given sentence requires the use of a gerund in order to make grammatical and logical sense. Gerunds are verb forms which function as nouns. An important thing to remember while identifying a gerund is that they are always in the -ing form.

Options A, C, D and E are incorrect because they do not comply with the reasons stated above. They would be grammatically incorrect if used in the sentence.