The Athletic Shoe Industry Is Highly Competitive

The athletic shoe industry is highly competitive. In recent years, companies like Allbirds and Skechers began offering shoes made of different materials or in different styles to better compete with industry giants Nike and Adidas. These new styles of athletic shoes that are being marketed to compete with shoes by Nike and Adidas would be considered

A) complements to shoes by Nike and Adidas.
B) substitutes for shoes by Nike and Adidas.
C) inferior goods compared to the shoes by Nike and Adidas.
D) normal goods compared to shoes by Nike and Adidas.