Well i am not 100 percent sure but i think the answer is D.
Answer:
d. method of studying
Explanation:
independent variables are what affects the dependent variable. the outcome that you are looking for (test performance) is the dependent variable. what affects the test performance is the change in method of studying, so that is the independent variable.
Answer:
Kindney Cancer
Explanation:
Cancer in the kidneys can lead to a lack of enough red blood cells, called anemia. Red blood cells transport oxygen to your body's tissues. When you don't have enough of them, you'll become tired, pale, and short of breath. Renal cell cancer can also release substances that increase your blood pressure.
