It's C, independent clause because those words can be turned into a sentence on it's own.
Okay so a direct object is something that directly affects the subject. Indirect objects follow the direct object.
Ex: “I bought Mary some books.” Mary would be the direct object & books would be the indirect.
You can predict that they will remain married and will live happily. He may have cheated on her with Cassandra, but what the man did back then didnt matter. Since she remained loyal and steadfast to him, he chose to remain with her.