____are used to convert acquired signals from the environment into ____ signals suitable for cognitive radio.

____are used to convert acquired signals from the environment into ___

1.	____are used to convert acquired signals from the environment into ____ signals suitable for cognitive radio.
A.	Sensors, physical
B.	Sensors, electrical
C.	Actuators, electrical
D.	Actuators, physical
Answer» C. Actuators, electrical