Answer
Que por práctica o estudio conoce bien una cosa. Usado también como sustantivo.
Explanation:
The answer would be a because many of the gold diggers actually didn't find gold. hope this helped :3
The American economy is booming,so its c :),hope this help
last option cause the sentence contains one independent clause and two dependent clauses.
A dependent clause is similar to an independent clause in that it has a subject and a verb, but it is not a complete thought. After a strenuous climb, and because night was rapidly approaching are dependent clauses because they cannot stand on their own. The hikers decided to make camp before reaching the summit is an independent clause because it can stand on its own out of context
