Answer :
The conversion which requires multiplication is kiloliter-liter.
The correct answer choice is option C.
Which conversion requires multiplication?
Arranging the prefix of the units in ascending order (smallest to largest)
milli-, centi-, deci-, unit, deca-, hecto-, kilo-.
Conversion involving left to right from smallest to largest means you divide.
Conversion involving right to left from largest to smallest means you multiply
So,
deciliter-liter - division
liter-kiloliter - division
kiloliter-liter - multiplication
milliliter-centiliter - division
Therefore, kiloliter-liter is the conversion that involves multiplication.
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