What is the difference between the IEEE, the WiFi Alliance, and the FCC, ETSI, and TELEC?

What is the difference between the IEEE, the WiFi Alliance, and the FCC, ETSI, and TELEC?

A.
The IEEE and FCC are responsible for the standards that apply to wireless networks. The WiFi Alliance, ETSI, and TELEC are the governmental agencies that regulate compliance with local standards.

B.
The IEEE is responsible for Layer 1 and Layer 2 protocols. The WiFi Alliance is responsible for interoperability testing. The FCC, ETSI, and TELEC are responsible for radio frequency and transmission power-level regulations and standards in the U.S., Europe, and Japan.

C.
The IEEE is responsible for Layer 1 and Layer 2 protocols. The FCC, ETSI, and TELEC are responsible for interoperability testing and compliance. The WiFi Alliance is responsible for radio frequency and transmission power-level regulations and standards on a global basis.

D.
The IEEE and FCC are responsible for the Layer 3 protocol support and frequency and power- level regulations in the United States. ETSI and TELEC are responsible for frequency and power- level regulations in Europe and Japan. The WiFi Alliance is responsible to interoperability testing.

Explanation: