Pls help I’ll mark the best one with 10 points

Communication comes in various forms. which of the following is considered an old form of communication? a) e-mail b) letter c) skype d) texting

Adisadvantage of corporations is that shareholders have to pay on profits.

As the inventor of hypertension medication, onesure pharmaceuticals (osp) inc. was able to reap the benefits of economies of scale due to a large consumer demand for the drug. even when competitors later developed similar drugs after the expiry of osp's patents, regular users did not want to switch because they were concerned about possible side effects. which of the following benefits does this scenario best illustrate? a. first-mover advantages b. social benefits c. network externalities d. fringe benefits