C． Co uses material B, which has a current market price of $0·80 per kg. In a linear program, where the objective is to maximise profit, the shadow price of material B is $2 per kg. The following statements have been made:(i) Contribution will be increased by $2 for each additional kg of material B purchased at the current market price(ii) The maximum price which should be paid for an additional kg of material B is $2(iii) Contribution will be increased by $1·20 for each additional kg of material B purchased at the current market price(iv) The maximum price which should be paid for an additional kg of material B is $2·80

Which of the above statements is/are correct?

A．(ii) only

B．(ii) and (iii)

C．(i) only

D．(i) and (iv)

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[问答题]This place has plentiful material resources.

[问答题]This place has plentiful material resources.

[问答题]This place has plentiful material resources.

[问答题]This place has plentiful material resources.

[问答题]This place has plentiful material resources.

[单选题]The material with which I’m going to make skirts ___________ easily. A. wash B. washes C. to wash D. washed

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[试题](b) The Superior Fitness Co (SFC), which is well established in Mayland, operates nine centres. Each of SFC’scentres is similar in size to those of HFG. SFC also provides dietary plans and fitness programmes to its clients.The directors of HFG have de