Option D
He is probably using Indirect questions information seeking tactics
Step-by-step explanation:
Indirect questions are a more formal process to demand erudition or perform requests. We regularly practice them when requesting something of immigrants or people we do not know well, including coworkers. Hinting is an indirect tactic.
It often transpires with questions about job execution. They are face-saving tactics. Indirect questions are a way of being respectful. We also practice them when requesting support from friends or when we desire to evade sounding demanding. But, some indirect questions do not exist wh-question words.