What is the usage of present perfect continuous tense? *
A.To talk about actions that started in the past and continue in the present.
B.To show the duration of an action started to happen in the past and is continuing to happen until the present time.
C.To talk about the situations in the future that we expect to happen but that are not in our control.
D.To talk about the situations in the future after we have decided what to do.