The correct answer is A) insulated handles. Screwdrivers designed for electrical use should have insulated handles to protect the user from electrical shock. This is a safety requirement specified in electrical codes and regulations, as electricians and technicians working on live electrical systems need tools that will insulate them from potential electrical hazards. The other options, B) larger than normal shanks, C) shorter than normal shanks, and D) longer than normal shanks, are not relevant to the safety considerations for electrical screwdrivers. The key feature that distinguishes electrical screwdrivers is the insulated handle, not the size or length of the shank.