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: Bower SFD728N Automatic TTL Flash for Nikon i-TTL
Product 2: Yongnuo YN-568EX II 4-Channel TTL Flash Speedlite Canon E-TTL/E-TTL II Cameras

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: B