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"Falling oil prices have caused a sharp decrease in the supply of oil." Speaking precisely, this quotation is ______.a. Correct; a decrease in price always causes a decrease in supplyb. Incorrect; a decrease in price causes an increase in supply, not a decrease in supplyc. Incorrect; a decrease in price causes an increase in the quantity supplied, not a decrease in supplyd. Incorrect; a decrease in price causes a decrease in the quantity supplied, not a decrease in supply