D. Could
Feedback When we make requests, we can use ‘can’ or ‘could’ (but not ‘may’ or ‘might’).‘Could’ is more polite than ‘can’:(more informal) Can I go home?; Can you do me a favour?;(more polite) Could I borrow you laptop today, please?; Could you give me a lift, please?; Could I have something to drink?Therefore, we are to choose ANSWER 4 ‘could’.