A group of hackers were roaming around a bank office building in a city, driving a luxury car. They were using hacking tools on their laptop with the intention to find a free-access wireless…

This choice appears to be a formatting artifact from the question stem and does not represent a valid attack technique or answer option.

GPS mapping refers to recording geographic coordinates of discovered networks and is a supplementary activity sometimes combined with wardriving, but it is not the name of the core scanning process described.

Spectrum analysis is a radio frequency technique used to measure signal strength and interference across a frequency range, not a targeted wireless network discovery hacking method.

Wardriving involves moving in a vehicle while using wireless networking equipment to detect and map Wi-Fi networks, often targeting unsecured or open-access access points. The scenario explicitly describes attackers driving in a car with hacking tools on a laptop seeking free-access wireless networks, which is the defining characteristic of wardriving. This technique is used to identify vulnerable wireless access points for later exploitation.