对于885－C－23中B选项错误的不解？（原创）

23.   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

知道答案后也觉得C比较顺，可是想不明白B错在哪里了，nn们请说说把！

逗号应该不能连接两个分句吧.  virtually unavailable outside Yokohama 的动词也是is

除了楼上MM提出的错误 选项B还有以下几个错误

1 在语法上Considered to be分句修饰genmai-cha,成为了附属成分,而原句中contains 和is consider是并列成分.

2 consider sth. sth.是GMAT中的用法,不使用consider sth. as或consider sth. to be

virtually unavailable outside Yokohama 不能做状语吗，起修饰作用？

i see,thanks