In automatic areas when all signals have failed and communication is available, the driver is issued ________ as authority to proceed. A. T/B-912 B. T/D-912 C. T/C-912 D. None of these

The correct answer is: A. T/B-912.

T/B-912 is a train order that authorizes a train to proceed through an automatic area when all signals have failed and communication is available. It is issued by the dispatcher and must be carried by the train crew.

T/B-912 is a safety measure that helps to ensure that trains do not collide in automatic areas when the signals are not working. It is important for train crews to follow the instructions on T/B-912 carefully to avoid accidents.

The other options are incorrect because they are not train orders that authorize a train to proceed through an automatic area when all signals have failed and communication is available.