please answer all the questionss.,.within 30 minutes. make sure the explanation and reasons are explained in very detailed manner as in why the chosen option is right and why other options are wrong. else leave it for other tutor otherwise i will give negative ratings and will also report your answer for unprofessionalism. Make sure the answer is 100% correct and IS NOT COPIED FROM ANYWHERE ELSE YOUR ANSWER WILL DOWNVOTED AND REPORTED STRAIGHTAWAY. USE YOUR OWN LANGUAGE WHILST WRITING.

ATTEMPT THE QUESTION ONLY IF YOU ARE 100% CORRECT AND SURE. ELSE LEAVE IT FOR ANOTHER TUTOR. BUT PLEASE DONT PUT WRONG ANSWER ELSE I WILL REPORT.

Make sure all the options whether correct or incorrect are explained properly. Dont just tell what option is correct and its reasoning clearly show the reasoning why the options are incorrect as well. Otherwise i will report the answer for sure and downvote it.

15. The 2.93 billion monthly active users of Facebook, make it difficult for more recent entrants such as Google Plus to compete effectively. Which of the following options most represents Facebook's strengths in terms of barriers to entry for companies that wish to join the social media industry? A. Economies of scale. B. Capital requirements. C. Network effects. D. Government policies