Answer:
family history, age, previous joint injury, and obesity
Pretty sure it is A, since kidney stones (also called renal calculi, nephrolithiasis or urolithiasis) are hard deposits made of minerals and salts that form inside your kidneys.
Kidneys main function is to cleanse the toxins from our blood, but they also use the waste to make urine.
The family has the greatest effect first on individual behavior
