Instruction: What is the relevance between the query and the product title below? Answer from one of the options.

Input:
Query: mattress twin firm
Product: Single Mattress, Inofia Super Comfort Hybrid Innerspring Twin Mattress Set with 3D Knitted Dual-Layered Breathable Cover, Twin Size

Options:
A: The product is relevant to the query, and satisfies all the query specifications.
B: The product is somewhat relevant. It fails to fulfill some aspects of the query but the product can be used as a functional substitute.
C: The product does not fulfill the query, but could be used in combination with a product exactly matching the query.
D: The product is irrelevant to the query.
Answer: A: The product is relevant to the query, and satisfies all the query specifications.