Which Statement Correctly Uses an Import Rule to Apply an External

Multiple Choice

Which statement correctly uses an import rule to apply an external style if the device screen has a maximum width of 480 pixels?

A) @url import("mobiledevice.css") screen and (max-width: 480px) ;
B) @import url("mobiledevice.css") screen and (max-width: 480px) ;
C) @screen import("mobiledevice.css") and (max-width: 480px) ;
D) @import screen and (max-width: 480px) u rl = "mobiledevice.css";