The grade V1 pupils conducted an experiment for them to be able to know the solubility of one tablespoon of salt based on the temperature of the water. They used 20ml. of cold water, 20 ml. of hot water and 20 ml. of tap water. 5 What is the manipulative variable in the solution?

A. Temperature of water

B. Amount of water

C. solubility of salt

D. Amount of salt

pls answer correctly thank you<33​