The correct answer is D. interfering.
Dabbling means to engage in an activity in a casual or superficial way. In the context of the question, the man is engaging in politics in a way that is not serious or sincere. He is doing it only to promote his own business interests, and he is not interested in the well-being of the country or its people.
The other options are incorrect because they do not accurately describe the man’s actions. Option A, including, means to make someone or something a part of something else. Option B, participating, means to take part in an activity. Option C, helping, means to do something to make someone or something better.
In the context of the question, the man is not making politics a part of his life, he is not taking part in politics, and he is not trying to make politics better. He is simply using politics to promote his own business interests.