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: Merrithew Foam Mini Stability Exercise Ball, 7.5&quot;
Product 2: Tune Up Fitness Coregeous&reg; Therapy Ball, Yoga Tune Up, The Roll Model Method: Used for Abdominal Massage, Myofascial Release, and Stress Reduction

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