30. We can conclude that _______________.
(A) safety programs are beneficial to plants of all sizes
(B) products reflect the cost of safety programs
(C)the government should pay for many safety programs
(D) there are too many injury claims
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統計: A(25), B(5), C(6), D(2), E(0) #1782136
統計: A(25), B(5), C(6), D(2), E(0) #1782136