The contractual liability-railroads endorsement?

• a. adds an exception to the definition of "insured contract" that precludes liability coverage for hold harmless agreements issued in favor of railroads.
•  b. deletes an exception to the definition of "insured contract" that precludes contractual liability coverage with respect to hold harmless agreements issued in favor of a railroad.
•  c. provides coverage to the railroad scheduled in the endorsement for liability assumed by the railroad in its railroad shipping agreements.
•  d. provides coverage to the railroad scheduled in the endorsement for liability assumed by the railroad in a construction contract with the named insured.