问题详情

What"s the problem with paper napkins and plastic food wraps？
A．They can" t be recycled though they help people save time on housework.
B．They become trash and therefore are harmful to the environment.
C．They add cost to the product and thus make it more expensive.
D．Sometimes they are not strong enough to hold the purchase.请帮忙给出正确答案和分析，谢谢！