Verified Answer :

Answer:

You are correct! His is the correct answer.

Explanation:

You shouldn't use 'their' because we already know that the two people in question are male. If it were 'children' instead of 'boys', you would use 'their'.

The pronoun that completes the given sentence correctly is "his."

What is a pronoun?

A pronoun refers to the word or a group of words that can be substituted for a noun or a noun phrase.

The pronouns that complete the sentence "Each of the boys began to clean his desk" correctly.

Therefore, A is the correct option.

Learn more about Pronouns here:

https://brainly.com/question/16548443

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