After booting up a new computer， a technician observes that the USB ports are not working with any USB devices. Which of the following should be done FIRST？（）

A.Check the computer to verify that the jumper settings for USB are correct.
B.Connect the USB devices to a different computer to test the devices.
C.Buy new USB wires and test USB functionality.
D.Check the BIOS to verify that USB functionality is enabled.