(A) Oil is one of the basic ingredients that make up cement
(B) Oil is a source of energy for some of the kilns used in the making of cement
(C) The higher the price of cement rises, the higher the price of clay rises
(D) Whenever oil prices rise cement prices drop
(E) A given amount of cement costs no more than the total cost of its basic ingredients
2. Many people do not understand themselves, nor do they try to gain self-understanding These people might try to understand others, but these attempts are sure to fail, because without self-understanding it is impossible to understand others. It is clear from this that anyone who lacks self-understanding will be incapable of understanding others.
The reasoning in the argument is flawed because the argument
(A) mistakes something that is necessary to bring about a situation for something that in itself is enough to bring about that situation
(B) fails to take into account the possibility that not everyone wants to gain a thorough understanding of himself or herself