I would say that punctuation, ie a comma , would precede the block quotation to set it apart and then quotation marks would be used to show that it is a quotation, both at the beginning and end of the passage. Quotations are good to show exactly what the author quoted meant so there is no doubt and which can then be accurately commented on.
The source stands to make a profit
Would you like to learn how to keep at least five extra dollars a day? Today I will show you how switching from bottled water to tap water will allow you to keep money in your pocket and save the environment.
Answer:
Maybe A. as an appositive with essential information
Explanation: