Subordinate clauses usually begin with a subordinate conjunction or a relative pronoun.
Yes and no, it just depends on your definition of quality and if you consider the use of your time of the highest quality.
Answer: A) After the ceasefire was declared, the soldiers were allowed to go home.
Explanation:
An independent clause is a clause that expresses a complete thought. It can stand on its own and still make sense. The independent clause in this example is "the soldiers were allowed to go home."
A subordinate clause, on the other hand, is a clause that does not express a complete thought. It cannot stand alone, because it has no meaning if not joined to an independent clause. "After the ceasefire was declared" is a subordinate clause.
All the other options contain two independent clauses - in option B, they are connected with a semicolon; in option C, with a conjunction "so"; in option D, with a comma and a conjunction "and."
