A vehicle designed to transport goods, with the cab integrated into the body and a maximum of nine seats, including the driver's, is...

Correct answer: a van.

It is a van or cargo van, a motor vehicle (automóvil) for carrying goods with its cab integrated into the body and up to nine seats, including the driver's seat. A truck may also have nine seats, but its cab is separate from the cargo body. A truck tractor is designed to pull a semitrailer.

Real Decreto 2822/1998, de 23 de diciembre, por el que se aprueba el Reglamento General de Vehículos