Can someone please help me with this question?: Choose the progressive perfect form of the verb!

Antonio along the river when someone began to pelt him with oranges.

Choose 1

(Choice A)
A
was walking

(Choice B)
B
had been walking

(Choice C)
C
had walked

Please don't give me a wrong answer. I'm trying so hard to get every one of these right

Ineed ideas for this essay something easy that i can do does anyone have any ideas on what i should write on for this 100 points ! write a procedural essay with media that is 1 ½–2 pages in length. clearly state your topic, and include all steps necessary to complete the procedure. you will submit your prewriting and planning documents along with your essay.

This is a set of words that begins with a preposition.

How does mercutio, in romeo and juliet, convey his anger before dying?