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   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.（C）

(E) Though virtually unavailable outside Yokohama, most Japanese consider genmai-cha, a special green tea that contains brown rice, a gourmet delicacy.

B错在哪里？C的it指代不明。语法上优先代green tea. 但如果unavailable outside Yokohama，如何可能被most Japanese认可。

我觉得B错在：virtually unavailable outside Yokohama在B里面，变成修饰brown rice的了，而且缺少that或者which

C中consider因为是不及务动词吧，所以不能少as

A, "consider as" is undiomatic

B, the dangling modifier "virtually unavailable" is used to modify the nearest noun "rice", distorting the original meaning

C, correct

D, like A

E, like B, use the modifier so that as if Japanese were virtually unavailable