Explanation:

- The given sentence has a verb tense issue. "Often coming here" suggests an action that is ongoing or habitual.

- Option 1: "Often have been coming here" - This implies an action that started in the past and continues to the present, but is less common for habitual actions.

- Option 2: "Are often coming here" - This is present continuous and appears awkward with the adverb "often," which suggests routine.

- Option 3: "Often are coming here" - Like Option 2, this is awkwardly structured for expressing habitual actions.

- Option 4: "Often come here" - This is present simple tense, which is appropriate for habitual actions.