The sentence which correctly uses the 2 clauses comma rule between the answer choices is; Choice B; The beach is very fun, yet the mountains are better.
It follows from convention that the 2 clauses comma rule is used in a bid to combine independent clauses by using a comma in combination with a coordinating conjunction.
As the name implies, independent clauses are considered sentences in their own but can be combined by means of the 2 clauses comma rule.
On this note, the correct use of the 2clauses comma rule is; Choice B; The beach is very fun, yet the mountains are better.
This follows from the 2 clauses comma rule which implies that;
In a bid to express two independent clauses as a whole, a comma should be placed after the first clause and then, the second is bonded using a coordinating conjunction.
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