Driving on a freeway at 120 km/h in heavy rain means driving at a speed that is…

Correct answer: Inappropriate for the conditions.

Heavy rain reduces traction and visibility, so you must slow down. Observing the speed limit alone does not make your speed appropriate.

Real Decreto 1428/2003, de 21 de noviembre, por el que se aprueba el Reglamento General de Circulación · Con lluvia, mantenga el control