Answer:
The answer is A
Step-by-step explanation:
If you look at this sentence:
Because Carl loved dogs, he got a dog for himself.
The dependent clause is "Because Carl loved dogs,". It does not make sense if is that is used as a sentence. The independent clause is "He got a dog for himself". The way I remember dependent and independent clauses are if you are independent, you do not need anyone else. If you are dependent, you will be depend on other people.