The increase in the price of jet fuel is due to a sharp decrease over

The increase in the price of jet fuel is due to a sharp decrease over the past year in the supply of jet fuel available relative to demand. Nonetheless, the amount of jet fuel available for sale is larger today than it was last year.

If the statements above are true, which one of the following conclusions can be properly drawn on the basis of them?


(A) The demand for jet fuel has increased over the past year. - CORRECT as it follows logically from the argument. The argument presents a correlation among the supply, demand and price of the jet fuel. If the supply has increased over last year and still the prices have gone up that concludes that demand has risen more than the increased supply.

(B) The fuel efficiency of jet engines has increased over the past year. - Opposite. If supply has increased and also the jet fuel efficiency then the demand should go down and so should the prices.

(C) The number of jet airline flights has decreased over the past year. - SAME as B. Same logic. Opposite to what logically follows from the argument.

(D) The cost of refining petroleum for jet fuel has increased over the past year. - Though the cost of refining petroleum has increased but we have no idea as to how it affects the prices. There's no correlation of that in the argument. Multiple possibilities could arise such as maybe the company wants to increase its profit margins etc.

(E) The supply of petroleum available for jet fuel has decreased over the past year. - Contradicts one of the statements of the argument. NOT COOL.

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