Sentence Correction

Hi there,

I cross out the 3 wrong answers choices but I hesitated between A and C. I selected C (I guessed). Could you explain to me why A is wrong (for sure). OA is C

A special Japanese green tea called genmai-cha contains brown rice and is considered as a delicacy fit for a gourmet by most Japanese, though it is virtually unavailable outside Yokohama.

(A) A special Japanese green tea called genmai-cha contains brown rice and is considered as a delicacy fit for a gourmet by most Japanese, though it is virtually unavailable outside Yokohama.
(B) Considered to be a delicacy fit for a gourmet by most Japanese, genmai-cha is a special green tea that contains brown rice, virtually unavailable outside Yokohama.
(C) A special Japanese green tea called genmai-cha contains brown rice and is considered a gourmet delicacy by most Japanese, though it is virtually unavailable outside Yokohama.
(D) Most Japanese consider genmai-cha, a special green tea which contains brown rice, as a delicacy virtually unavailable outside Yokohama.
(E) Though virtually unavailable outside Yokohama, most Japanese consider genmai-cha, a special green tea that contains brown rice, a gourmet delicacy.

between A and C there is only one diff considered as in A and Considered in B( rule when consider implies considered as then in GMAT we dnt use as with consider) therefore C will be preffered over A in GMAt

just go through this article in BTG for better understanding

https://www.beatthegmat.com/a/2009/09/29 ... -questions