Wrong place this is the mathematics section
The answer should be B) because social media is a long distance communication tool for people, so not C) since that's false, that's where most danger is at is online, not D) because that wasn't the original purpose, but sadly its become popular now and not A) because that's incorrect.
Heat is thermal energy transferred from one object to another because of a difference in Temperature
Answer:
I think it's A because article noun cannot be used Infront of uncontactable noun if it is not properly mentioned
Possibly to emphasize it, or to mark it as being sarcastic. You choose.