Which description best fits stroke volume? the amount of blood pumped in one beat
the amount of blood pumped by the heart in one minute
cardiac output multiplied by the number of red blood cells
cardiac output multiplied by blood pressure

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.

The answer is d because , safety almost always works, to prevent stds and pregnancy