What does this code do?

Code:
@media only screen and (orientation: landscape) {
    body {
        background-color: lightblue;
    }
}

A. web page will have a lighblue background if the orientation is in landscape mode

B. web page will have a lighblue background if the orientation is not in landscape mode

C. web page will have a red background if the orientation is in landscape mode

D. None of the mentioned

Answer: Option A