Final answer:
Crossing the GAL4 driver with the UASTRP line would result in progeny with no courtship behavior.
Step-by-step explanation:
Crossing the GAL4 driver with the UASTRP line would result in progeny with no courtship behavior. Since the P1 neuron of males is required for courtship, the GAL4 driver that is only expressed in the P1 neuron needs to be crossed with a UAS line that would prevent the expression of the P1 neuron. The UASTRP line would be a suitable choice, as it can inhibit the expression of the P1 neuron, leading to progeny with no courtship behavior.