Sustain a regular routine of exercise for 30-60 minutes with minimal fatigue
The body of a multicellular organism<span>, such as a tree or a cat, exhibits organization at several levels: tissues, organs, and organ systems. Similar </span>cells<span> are grouped into tissues, groups of tissues make up organs, and organs with a similar function are grouped into an organ system.</span>
Indeed, C and B both are correct, however, A is also correct as your circulatory system will be mostly affected due to lower oxygen levels. Due to these, there will also be less oxygen which can be caried around in your bloodstream.
