The correct option is D) 1000
There are 1000 milliliters in a liter (1000 mL in 1 liter).
1 liter equals to the volume of 1 cubic decimeter and 1 mL is 1 cubic centimeter.
1 decimeter is 10 centimeters and 1 decimeter cube is 10 * 10 * 10 = 1000 cubic centimeters (mL).
Therefore To convert from liters to milliliters, as a formula multiply the number of liters "x" by 1000.