Hurry plz! Which of these sentences uses the progressive tense of the verb?

H. klkl

The answer should be d.

is basically a good source of getting and others by what you know for example if someone asked a question and you know the answer you could answer it and get some points or if you need on a question you could make a post about it and wait till someone answers it or just look up the question and see if someone else has asked about it