Consider the following systems:(a) Satellite(b) Conventional Public Address System(c) Conventional Radio Receiver(d) Laser detectorArrange the above systems in order of their increasing order of operational frequency:

• A. (c), (b), (a), (d)
• B. (b), (c), (d), (a)
• C. (a), (b), (c), (d)
• D. (b), (c), (a), (d)