Answer:
The correct answer is B, Short Selling stock in response to an internal memo.
Step-by-step explanation:
Insider Trading is the short selling of stocks of a company when an information is received from the internal resources of the company which is not available for the general public. Short selling is the trading strategy which assumes a decline in a stock price, due to which a person sells his stocks. So insider trading is the short selling of stocks in response to an internal memo. When a person gets information from inside the company about the future prospects of the company, and this information is not publicly available, this is called insider trading.