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: STK Canon BP-511 BP-511a Battery - 2 Pack 2200mAh for 30D, Digital Rebel, G5, 50D, 5D, G3, 40D, G1, 20D, D60, G6, G2, Pro 1, 300D Digital Cameras
Product 2: Sandisk Ultra II 2GB 15mb/s Compactflash Card

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: A