A、  B、  C、  A Green is a good color answers what color will you paint the walls．Choice (B) answers why．Choice(C

Where are the invoices?
(A) They’re in the files.
(B) Her voice is low.
(C) The invoice is paid.

What color will you paint the walls?
(A) I think green’s a good color.
(B) Because he painted it blue.
(C) He read the poster on the wall.