The Present Perfect tense is used to describe actions that have a connection to the present, so the correct sentence is in this tense.

Purpose: To explain why sentence C uses the Present Perfect tense.

Introduction:
The Present Perfect tense is used to describe an action or event that started in the past and has a connection to the present. It is often used to talk about experiences, actions that have occurred at unspecified times before now, or actions that have recently finished.

Explanation:
Sentence C: He has visited Paris.

In this sentence, the verb "has visited" is in the Present Perfect tense. Let's break down the sentence to understand why it uses this tense.

Subject: He
Verb: has visited
Object: Paris

Present Perfect Form:
The Present Perfect tense is formed by using the helping verb "has" or "have" followed by the past participle form of the main verb.

In this sentence, the helping verb "has" is used because the subject "He" is a singular third-person pronoun. The past participle form of the verb "visit" is "visited."

Meaning and Connection to the Present:
The use of the Present Perfect tense in this sentence suggests that the action of visiting Paris happened at an unspecified time in the past. It does not mention a specific time or date, only that it has happened before now.

The Present Perfect tense indicates that there is a connection between the past action of visiting Paris and the present. It implies that the person has visited Paris at some point in their life, and this experience is relevant or important in the present context.

Conclusion:
Sentence C, "He has visited Paris," uses the Present Perfect tense because it describes a past action (visiting Paris) that has a connection to the present. The use of the helping verb "has" and the past participle form "visited" indicates that the action happened at an unspecified time before now. This tense is commonly used to talk about experiences and actions that have occurred in the past but are relevant or important in the present.