Read the following paragraph and determine if the hypothesis is true:

The credit card mobile phones now provided on some aircraft, do not interfere with aircraft systems because they are wired to a special "base station" that has been designed to safely receive and transmit radio signals in the aircraft.

Possible answers:
 a). Yes;
 b). It's impossible to say;
 c). No;
Hypothesis: credit card mobile phones are highly profitable



b).