Select "yes" for those statements below that are accurate and choose $"$no$"$ for those that are not.

a$.$ Switching costs are too high for Under Armour, Nike, and Adidas to find suppliers who offer the same quality performance fabrics.

b$.$ The two types of suppliers that really matter are $(1)$ the suppliers$/$makers of performance$-$based fabrics and $(2)$ the contract manufacturers that actually produce the apparel items.

c$.$ Fabric suppliers having nondifferentiated or commodity$-$like performance fabricslave significant bargaining power to the extent that comparable fabrics are readily available from other fabric suppliers at competitive prices.

d$.$ Fabric suppliers having proprietary fabrics with superior performance features and$/$or superior quality and$/$or especially stylish designs have significant bargaining power to influence prices and other terms and conditions.