The options (B), (C) and (D) are the examples of compound sentences.
Example is the thing which resembles of its kind.
Compound sentences have two independent sentences linked by words or punctuations.
In option (B), the connector is the semi colon.
In option (C), punctuations, and are the connectors.
In option (D), punctuations, and are the connectors.
In options (A) and (E), there are no independent sentences although they have connectors.
Hence the three options (B), (C) and (D) are correct.
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