In which situations do we use present perfect tense?

A. Present perfect tense is used for actions that have no connection to the present

B. It is appropriate to use present perfect tense for ongoing actions

C. We use present perfect tense in situations where the action started in the past and has a connection to the present, to talk about experiences or actions that have happened at an unspecified time before now, and to discuss actions that have been completed recently.

D. We use present perfect tense to talk about future actions