If you're aerobically fit, you can
a. run a marathon without experiencing fatigue.
b. quit your normal exercise routine without any negative effects.
c. sustain a regular routine of exercise for 30-60 minutes with minimal fatigue.
d. lift very heavy weights without injuries to your joints.

The question is asking what you can do, if you are earobically fit. These are the options: A. run a marathon without experiencing fatigue. - this is not possible. Even the most experience marathon runners experience fatigue, as marathons are very extreme activities B. quit your normal exercise routine without any negative effects. - this is also not true. Being aerobically fit does not stay for life, but you have to practice it, so you have to keep your routine. C. sustain a regular routine of exercise for 30-60 minutes with minimal fatigue. - yes, this is the correct option! This is doable i you're fit, but not if you're note. D. lift very heavy weights without injuries to your joints. - this is not true- lifitng heavy weights is always a strain on your body, whether you're fit, or not

Make a decision because you before you make a decision you have to know what it’s about and do reasearch

Air goes past the epiglottis and into the trachea when you breathe in. from there, it goes to your vocal cords in the larynx until it reaches the bronchi. from the bronchi, air passes into each lung.