Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.
A. We do not know what to do with our knowledge.
B. Machines should be fed promptly and waited upon attentively, otherwise they refuse to work or cause destruction.
C. For example, we are unable to manage our machines.
D. Science has given us superhuman powers, which we do not use properly.