Read the two sentences.

@Oobleck Can you help me? I asked this question about two hours ago, but no one answered so I re asked it

Hello? Oobleck, Reed anyone please

Hello!! I still need help please

its D lol

To determine which sentence combines the two sentences using a past participle, let's first understand what a past participle is. A past participle is a form of a verb that is typically used to form the perfect tenses or the passive voice.

Now, let's analyze each option:

A. He submitted the completed assignment to his teacher.
In this sentence, the word "completed" is a past participle. It is used to describe the assignment and is in the past tense. This sentence combines the two sentences using a past participle.

B. He completed the assignment and then submitted it to his teacher.
In this sentence, there is no past participle used. The verbs "completed" and "submitted" are in the past tense, but they are not in the form of a past participle.

C. Before he submitted it to his teacher, he completed his assignment.
This sentence uses the past tense but does not include a past participle.

D. He submitted the assignment to his teacher after he completed it.
Similar to option B, this sentence uses the past tense but doesn't include a past participle.

Therefore, the correct answer is A. He submitted the completed assignment to his teacher. By using the word "completed," it combines the two sentences using a past participle.