Which of the Following "Cons" Involves the Use of a "Boiler

Multiple Choice

Which of the following "cons" involves the use of a "boiler room?"

A) The con gets access to credit card numbers and makes purchases
B) The con uses the telephone to sell vacations, investments or prizes
C) The con travels door to door selling shoddy goods or services
D) The con sells fake lottery tickets or promissory notes