Spanish Vocabulary and Grammar 2.17 100%

Fill in the blank with the Spanish word that best completes the following sentence.

Jaime está ___________ por mucho tiempo.
A. en línea
B. la ventana
C. guardar
D. la pantalla

The answer is A. en línea

(Literally EVERYONE has the answer marked as D. la pantalla, but it's wrong)...

Ehemmm... this is to help others :D