Instruction: Evaluate the titles of Product 1 and Product 2, then choose the option that best describes the relation between the two products.

Input:
Product 1: Antec Sonata Elite Black ATX Mid Tower Computer Case
Product 2: CORSAIR CARBIDE AIR 540 ATX Cube Case, High-Airflow - Black

Options:
A: Users who buy product 1 may also buy product 2.
B: Users who view product 1 may also view product 2.
C: The product 1 is similar with the product 2.
Answer: C