The use of the commands is for connecting the two independent clauses, Hence option C is correct.
The use of commas is for the punctuation mark and appears in several types of languages and indicates the brief phases, it is used for separating the words.
The commas use refers to the connection of the independent clauses that can be sen in the example that my estate is for my husband, son, daughter-in-law, and nephew.
Find out more information about the commas.
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