Why should you remove plastic caps from bottles when you recycle them?
a. A small amount of nonrecyclable plastic can contaminate and make useless recycled plastic.
b. It is impossible to remove plastic caps from bottles before recycling.
c. Plastic bottle caps cost too much to dispose of after their removal.
d. The coloring of bottle caps makes them difficult to recycle.
e. Bottles with caps on cannot be recycled and are thrown away.