When accessing the Internet using wireless hotspots, such as those found at airports and coffee shops, what is the major drawback for wireless users?

A.
Connectivity speeds are slow because hotspots use 802.11a equipment.

B.
The open architecture and ease-of-use negates the possibility of a highly secure environment.

C.
Hotspots limit application use to only Internet surfing and checking email.

D.
All hotspots require costly yearly subscriptions to access the service.