关于分号的用法；

There are lots of explainations on semicolon (;),

For example OG50

C incorrectly uses the semicolon, which should separate independent clauses, to set off a verb phrase.

OG56

C and E each contain a faulty semicolon and produce errors in idiom,

OG81

Choice A also incorrectly uses and and a semicolon to separate an independent clause and a phrase.

OG172

Choice A incorrectly uses a semicolon rather than a coordinating conjunction (but) to connect the coordinate parts; a semicolon should be used to join independent clauses.

OG261

C is best. The first clause presents its information clearly and in logical sequence. The use of a semicolon to set apart the remaining information further assists the clarity of the sentence.

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It seems the small semicolon is important to choose the right answer, however it makes me very confused. I hope to get some tips from all XDJM.

Thanks.