Replace `she will complete’ by ‘she has completed’.

The sentence contains an error in Part (3), which says, "after she will complete." This phrasing is incorrect because the word "after" already implies that the action will take place in the future. Therefore, it is incorrect to use the future tense "will" after "after." The sentence should read, "after she completes her education."

The corrected sentence would be:

She hopes to (1) / become an engineer (2) / after she completes (3) / her education. (4) / No Error (5)

Let's break down the grammatical concepts used in this sentence:

• Infinitive: "to become" is an infinitive used as the direct object of the verb "hopes."
• Future tense: "will complete" is a future tense verb used to indicate a future action. However, as discussed earlier, it is incorrect to use it after "after."
• Simple present tense: "completes" is a present tense verb used after "after" to indicate a future action that will be completed.

The corrected sentence follows the rules of English grammar and presents a clear meaning. It uses the correct verb tense, and the structure is consistent with the subject-verb agreement. Therefore, the correct answer is option (C).