Complete the sentence: By 1935 most were being bought for use _________ home.

• A. At
• B. In
• C. On
• D. For

Answer: (A)

This question tests choosing the right preposition to show where something is intended to be used. The natural expression is “for use at home.” Use of at here signals location or environment where the activity happens, and “home” is treated as that place. Saying “use in home” would be unidiomatic because we don’t normally combine “in” with bare “home” to describe where an activity takes place; we say “at home” instead. “On” would be inappropriate for this context. The phrase “for use at home” is a common, correct collocation describing the intended location of use.