Instruction: Evaluate the titles of Product 1 and Product 2 to assess their similarity and whether they are likely to be purchased or viewed together. Then, select the appropriate option.

Input:
Product 1: Harman Kardon Audiophile Performance Home Theater Receiver (AVR 1510S)
Product 2: Harman Kardon Audiophile Performance Home Theater Receiver (AVR 1710S)

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