塑料垃圾因为难以被自然分解一直令人类感到头疼。近年来，许多易于被自然分解的塑料代用品纷纷问世，这是人类为减少塑料垃圾的一种努力。但是，这种努力几乎没有成效，因为据全球范围内大多数垃圾处理公司统计，近年来，它们每年填埋的垃圾中塑料垃圾的比例，不但没有减少，反而有所增加。 以下哪项如果为真，最能削弱上述论证( )

A．近年来，由于实行了垃圾分类，越来越多过去被填埋的垃圾被回收利用了

B．塑料代用品利润很低，生产商缺乏投资的积极性

C．近年来，用塑料包装的商品品种有了很大的增长

D．上述垃圾处理公司绝大多数属于发达或中等发达国家

Sometimes we have specific problems with our mother; sometimes, life with her can just be hard work. If there are difficulties in your (1) , it’s best to deal with them, (2) remember that any (3) should be done (4) person or by letter. The telephone is not a good (5) because it is too easy (6) either side to (7) the conversation.

Explain to her (8) you find difficult in your relationship and then (9) some new arrangements that you think would establish a (10) balance between you. Sometimes we hold (11) from establishing such boundaries because we are afraid that doing (12) implies we are (13) her. We need to remember that being (14) from our mother does not (15) mean that we no longer love her. If the conflict is (16) and you cannot find a way to (17) it, you might decide to give up your relationship with your mother for a while. Some of my patients had (18) "trial separations". The (19) allowed things to simmer down, enabling (20) .

（17）（）

A.shape

B.resolve

C.simulate

D.grind