Why are you supposed to use a new needle for checking your blood sugar?

You are suppose to change your lancet every time you check your blood pressure because it can prevent changes in skin, infections, painful fingersticks, etc.

You have to change it other wise you could add infection to your skin and cause possible damage to you blood cells.

The correct answer is c

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.