Which sentence is written incorrectly?
A) Regina shrieked when she tried to turn on the lamp and the bulb blew out with a huge popping sound.
B) After much heated questioning and probing, the child finally admitted, that he had stolen the cookie.
C) Mrs. Franklin believed, with good reason, that her students were not mature enough to manage their time in study hall.
D) The library is removing all the DVD's from its collection today, so if you want a free DVD, please come down and visit!