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: HQRP 19V AC Adapter for Petsafe Wireless Pet Containment System Transmitter RFA-374 PIF-300 IF-100 650-231 Radio-Systems Power Supply Cord Adaptor Charger + Euro Plug Adapter
Product 2: HQRP AC Adapter for Radio Systems 650-627 PetSafe Stay and Play Wireless Extra Transmitter PIF00-13210 RFA-464 PIF00-12917 Power Supply Cord Adaptor + Euro Plug Adapter

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