one way to punctuate a compound sentence correctly is to join the two independent clauses with\na comma.\na…

Brief Explanations:

A compound - sentence consists of two or more independent clauses. One correct way to punctuate it is by using a semicolon to join the independent clauses. A comma alone is not enough (creates a comma - splice error). A comma with a subordinating conjunction is for complex sentences. A semicolon and a coordinating conjunction is incorrect usage as a semicolon and a coordinating conjunction serve similar purposes in joining independent clauses and using both is redundant.

Answer:

B. a semicolon