When an operator wishes to establish communication with a specific station, the following items shall be transmitted in what order?
1. The words THIS IS
2. The frequency on which the calling station is transmitting
3. The call sign of the station called (not more than three times, once if radio conditions are good)
4. The call sign of the station calling (not more than three times, once if radio conditions are good).
5. The invitation to reply (OVER)
a. 1, 3, 2, 4, 5
b. 2, 1, 3, 4, 5
c. 1, 2, 3, 4, 5
d. 3, 4, 1, 2, 5