Mason's semi$-$ trailer sustains collision damage while it is in the custody of Dixon Trucking under the terms of trailer interchange agreement. Symbol $62$ indicates that Mason's motor carrier policy provides collision coverage on owned autos. Mason's insurer

$($Search Chapter $4)$

a$.$ will not pay for the collision damage to this trailer unless Dixon's insurance does not cover it$.$

b$.$ will not pay for the collision damage to this trailer unless symbol $70$ also applies.

c$.$ will pay for the collision damage to this trailer because all trailers are automatically covered.

d$.$ will pay for the collision damage to this trailer because it is an owned auto.