The correct answer is B.
The first two sentences are establishing characteristic shared by both petroleum and coal. The word "however" is used to contrast the similarities already presented with the differences that will be stated in the following sentences.
The answer is A..><span>Test it out before you begin</span>
Answer:
im 99.99℅ sure that the answer is "B"
Answer:
I think it's mean Ask me anything my teacher tought this last year
Explanation:
I’d say A. should learn how to age gracefully
