Sally Often Travels for Her Business

Sally often travels for her business. She needs a way to access the Internet while away from home. She has come to you for help.
-Another option Sally is considering is a portable satellite system.She asks you about the details and you tell her ____.

A) a vehicle-mounted satellite dish can be deployed from a control panel inside the vehicle
B) signals can no longer be captured dependably if a fixed satellite dish moves out of alignment
C) the challenge is to make sure the dish is correctly aimed from the location where it is used
D) all of the above