Instruction: Analyze the titles of Product 1 and Product 2 to determine if they are similar, if they will be purchased or viewed together, and choose the corresponding option.

Input:
Product 1: 77MM Altura Photo Neutral Density Professional Photography Filter Set (ND2 ND4 ND8).
Product 2: Marumi 77mm ND 100000 Filter DHG Neutral Density Digital 100K 77 Made in Japan Digital High Grade

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