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: Retevis 2 Pin Acoustic Tube Earpiece Headset Walkie Talkie Earpiece with Mic PTT Compatible Baofeng UV-5R BF-888S Retevis H-777 RT21 RT22 RT27 H-777S RT-5R RT7 Arcshell (2 Pack)
Product 2: Retevis RT21 Walkie Talkies Rechargeable 16 Channels FRS License-Free 2 Way Radios( 4 Pack)

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