A Secondary Market for the Resale of Baseball Tickets,known as Scalping

A secondary market for the resale of baseball tickets,known as scalping:

A) prevents mutually beneficial exchanges.
B) is likely to increase revenues for the team owner since season ticket holders can resell their tickets instead of not attending a game.
C) is likely to increase season-ticket sales since some people who wouldn't have otherwise seen the game,will buy tickets.
D) lowers the ability of the season ticket holders to attend a baseball game with their families.