Type NM cable passing horizontally through the space between two studs in a one-family dwelling is:

The answer is correct because the National Electrical Code (NEC) allows non-metallic (NM) cable, commonly known as "Romex," to be installed in horizontal runs between studs within walls in residential structures, such as one-family dwellings. This installation method is deemed acceptable as it allows for efficient wiring while maintaining the necessary clearances and minimizing damage to the cable.

When NM cable is run horizontally between studs, it must be properly secured and protected according to the NEC standards. This entails ensuring that the cable is fastened within a specified distance from the studs and that it is not subject to physical damage. Overall, the practice of running NM cable horizontally in this manner aligns well with safe wiring practices and is widely adopted in residential electrical installations.