Instruction: Given the title of two products, predict if the two products are similar, if the two products will be purchased or viewed together. Answer only from the options.

Input:
Product 1: Emart Photo Video Studio Background Backdrop Stand Kit, 8.5x10ft Photography Support System with 3 Muslin Backdrops 100% Cotton (Black White Green)
Product 2: Excelvan Photography Lighting Kit 10x6.5FT 1250W Daylight Umbrella and Backdrop Support Stand and 3 Background 9x6FT, White Black Green

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