One of the following items is a run-on (or fused) sentence, another contains a comma splice, and another is correct. Choose the item that is correct. He was late for work because his alarm clock was broken.

He was late for work his alarm clock was broken.

He was late for work, his alarm clock was broken.

He was late for work because his alarm clock was broken .

Explanation:

The second one is a run- on sentence. Without the because, there should be a period between the first and second half. The third one has an unnecessary comma.

The right answer is Present Perfect.

Explanation:

Present perfect is a tense used to describe an action that started in the past, but the precise moment is not important, and that action continues or has a relation with the present.

Sentences in presents perfect hace the following structure:

Subject pronoun + Auxiliary Verb (Have/Has) + Verb in past participle such as in the sentence He has collected that particular coin for several years. It shows that the man started to collect that coin in the past, we do not know exactly and the action continues in the present.