Which types of outlets must be installed to provide GFCI protection?

GFCI protection is specifically required in areas where the risk of electrical shock is higher due to the proximity of water. The correct answer indicates that GFCI outlets must be installed in key locations, such as bathroom and kitchen counter areas, as well as outdoor outlets.

In bathrooms, GFCI protection is crucial because of the potential for water exposure from sinks or humidity. Similar conditions exist in kitchen countertops, where sinks are commonly located, and where appliances may frequently be in use. Outdoor outlets are also mandated to have GFCI protection due to their exposure to rainy or damp conditions, which increases the risk of electrical hazards.

This combination of locations covers the most vulnerable areas in a residential setting regarding electrical safety, thereby reducing the risk of electrical shock. Other options fail to encompass the full range of NEC requirements for GFCI installations in residential applications, as they either restrict the locations to fewer areas or do not meet the specific guidelines set forth by the NEC.