Make a sentence from the cues

Make a sentence from the cues

They / concern / the new mall / for ages.

(Chỉ được chọn 1 đáp án)

A.
They have been concerned about the new mall since ages.
B.
They have been concerned about the new mall for ages.
C.
They have concerned about the new mall for ages.
D.
They have concerned about the new mall since ages.