Charles, the president of an it company, is friends with levi, the ceo of cyber industries, a company that develops and manufactures computer hardware. levi tells charles that cyber industries is about to announce the creation of a revolutionary new computer processor that will quadruple processing capacity and cause cyber industries’ sales and profits to skyrocket. charles then purchases a large number of shares of cyber industries company stock before the news of the new computer processor is made public. in which illegal activity has charles engaged

a. a ponzi scheme.

b. short selling.

c. issuing is call.