This is a "must be true" question. Always keep in mind "no new information accepted
", the right answer must pass the "Fact test".ANALYZE THE STIMULUS:
Fact: Recent statistic shows that total consumption of electricity could not determine its cost to individual consumers.
Fact: Recent increase in total consumption especially ==> accompanied by a decrease in the cost per unit and by an increase at other times
What must be true based on the information above.ANALYZE EACH ANSWER:
A. It must be the case that the cost of electicity to comsumer is what determines the total consumption. Wrong.
It's a reverse answer.
B.Even though a correlation exists between the total consumption of electricity and its cost to consumer, no casual relation exists. Wrong.
The stimulus says that total consumption of electricity is unlikely
used to determine its cost to consumer. ==> cannot exist a correlation between A & B if A cannot be used to determine B.
C. Further investigation into the way these statistics were gathered is certainly called for. Wrong.
Out of scope. Nothing about "further investigation" ==> C does not pass the "Fact test"
D.The cost of electicity depends upon something other than the total consumption of electricity. Correct.
The stimulus says that total consumption of electricity is unlikely used to determine its cost to consumer. ==> there must be another factor used to determine the cost of electricity.
E.The cost per unit of electricity to consumer is dependant on the total electicity consumption. Wrong.
Nothing about "cost per unit". ==> E does not pass the "Fact test"
Hope it helps.
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