Which of the following is the MOST likely cause of a low wireless signal after an internal wireless adapter on a laptop was replaced?（）

A. The wireless card must be calibrated to the laptop.
B. The correct preshared encryption key must be installed to boost the signal.
C. The MAC address of the new wireless card will have to be added to the WAP to get the full signal.
D. The antenna wires for the wireless card were not attached.