Final answer:
Common materials used in subflooring include one-inch wood boards, plywood, and Oriented Strand Board (OSB), with the choice depending on factors like cost and durability.
Step-by-step explanation:
The materials commonly used in subflooring are one-inch wood boards, plywood, and Oriented Strand Board (OSB). Historically, one-inch wood boards were the standard for subflooring material. Over time, plywood became popular due to its durability, strength, and resistance to warping. Oriented Strand Board (OSB) is a cost-effective option used in modern construction, offering similar performance to plywood with a lower price tag. When constructing or renovating floors, builders consider factors like cost, durability, and the intended use of the space before selecting a subflooring material. In conclusion, the main answer is d) a, b, and c, as all listed materials have been or are currently used in subflooring applications. The choice of material will depend on various factors, including budget, building codes, and preferences.