The answer depends on what happens before this quote. If the parents argued a lot before this, then it could be A, they frequently argue, but they also apologize. But by using process of elimination, it is either A or D
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Answer:
<h2>Today the trees were cut by the woodcutter.</h2>
B. The dog needs to go for a walk.
Remember, independent clauses make sense by themselves. The other two options do not make any sense, therefore, they are dependent clauses. B makes sense so it is an independent clause.