When given clearance to taxi by ATC, pilots:

A. Do not have to hold short of intersecting runways.

B. Are cleared for intersecting runways and onto the assigned runway.

C. Shall taxi to the assigned runway via the most expeditious route.

D. Will hold short of intersecting runways on the route of taxi until obtaining specific clearance to cross.

Pilots must hold short of intersecting runways when taxiing until they receive specific clearance from ATC to cross, as per AFI 11-202v3 and AETC SUP.

Explanation:

When given clearance to taxi by ATC, pilots must adhere to specific protocol as outlined in the Air Force Instruction (AFI) 11-202v3, Air Education and Training Command Supplement (AETC SUP). According to these regulations, the correct response is that pilots will hold short of intersecting runways on the route of taxi until obtaining specific clearance to cross. Pilots are not automatically cleared to cross intersecting runways or to taxi to the assigned runway via the most expeditious route without specific instructions. It is imperative for safety and for adherence to air traffic control instructions that pilots wait for clear and explicit clearance before proceeding onto intersecting runways.