Answer:
A.1. milliliter, 2. centimeter, and 3. gram
Explanation:
The quantity of water could be measured in mililiters or liters depending on the quantity, then the length of a leaf should be measured in centimeters as it won´t be longer than a meter, so the best way to measure it is centimeters, and the mass of a small stone is about 25-100 grams so the units to measure it should be grams.