Cisco question - why others options are wrong?

[oldcavalheiro]

Why letter A and D are wrong answers in this Cisco question???
to me "3G ,4G" and "mobile phone service provider" also provide internet connection

A student purchased a new Wi-Fi-enabled tablet computer. What is required to connect this device to the internet?
A - a 3G or 4G network
B - a telephone company
C - a wireless LAN
D - a mobile phone service provider
explain: To access the internet using WiFi the tablet will need to access a wireless LAN.

[bill.king1 · Accepted solution]

What is this question from, that might help it potentially get placed in a better group.