Answer: B. Explain answer.Reasoning:- In this sentence, we are talking about an action that started in the past (buying the car in July) and continues into the present (owning the car for six months now).- To express this ongoing action, we need to use the present perfect tense, which is formed with "have" or "has" followed by the past participle of the main verb.- In this case, the main verb is "have" (in its sense of "own" or "possess"), and its past participle is "had."So, the correct answer is B: "have had." The sentence should read:I bought this car in July, so now I have had it for six months.

Explanation:

The correct answer is option C, "am having."

- The sentence states that the car was bought in July. This means that the action of buying the car occurred in the past.
- The phrase "for six months" indicates that the speaker is talking about the duration of time that has passed since the purchase of the car. This duration is ongoing until now.
- The present continuous tense is used to talk about ongoing actions or situations in the present. In this case, the ongoing action is the possession of the car for the past six months.
- The present continuous tense is formed by using the auxiliary verb "am" (for the first person singular) or "are/is" (for the other persons) followed by the present participle of the main verb.
- In the given sentence, the correct form is "am having" because the subject "I" is in the first person singular.

Example:

- The sentence can be rewritten as: "I bought this car in July, so now I am having it for six months."

Other options:

- Option A, "have": This is the present simple tense, which is used to talk about general truths or permanent situations. It is not suitable in this context because the possession of the car for six months is an ongoing action in the present.
- Option B, "have had": This is the present perfect tense, which is used to talk about actions that started in the past and continue up to the present. However, the sentence does not indicate that the possession of the car is continuing up to the present moment.
- Option D, "had": This is the past simple tense, which is used to talk about completed actions in the past. It is not suitable in this context because the possession of the car for six months is an ongoing action in the present.