Many Factors Affect the Ability of a Carpet Fiber to Withstand

Many factors affect the ability of a carpet fiber to withstand crushing and abrasion other than foot traffic. What other factors of the choices listed below contribute to crushing and abrasion?

A) Type of carpet, Humidity, Furniture movement
B) Maintenance, Surface Texture, Density
C) Height of carpet pile, Weight of Furniture, Cleaning chemicals
D) Binding, Atmospheric conditions, Furniture placement