What happened to my wireless signal?

A client’s laptop has recently had its internal mini-PCI wireless adapter card replaced. Although the drivers for the card load without any errors and the Windows Device Manager shows the card working properly, the wireless card management software shows very low signal strength. The wireless card keeps dropping its wireless connection and will not maintain a consistent network link. What is the most likely reason for this problem?

A) The mini-PCI card isn’t compatible with the laptop

B) The operating system doesn’t support the wireless card

C) The wireless adapter antenna cable isn’t connected

D) The wireless card is administratively powered off