Which invention is tied to dairy farming equipment?

• A. Vacuum milking glove
• B. Mechanical reaper
• C. Telephone
• D. Light bulb

Answer: (A)

Dairy farming relies on equipment that uses vacuum to draw milk from the udder, automating or assisting the milking process. A vacuum milking glove fits this domain because it is designed to apply suction to the teats to express milk, directly tying it to dairy farming equipment. The other inventions belong to unrelated areas: the mechanical reaper helps harvest grain, the telephone is a communications device, and the light bulb provides general illumination. So the vacuum milking glove is the one that clearly connects to dairy farming equipment.