Graduated cylinder because it is extremely precise
Explanation:
In a chemistry lab, volume of chemicals can be measured by several tools such as beakers, flasks, burets, pipets , graduated cylinder etc. Out of these, I would preferably use graduated cylinder for measuring 50 ml of salt water. It is so because graduated cylinder have a high accuracy of 1% which means a cylinder of 10 mL can measure a volume of 0.1 mL accurately. Usually the common sizes in which graduated cylinders are available ranges from 5 mL to 3000 mL
Out of the choices given, the reason why Kathy's body feels sore and she has pain in her limbs after vigorously exercising is an accumulation of lactic acid in the muscles of her limbs. The correct answer is A.