Quantum mechanics is the study of nature at a very small scale, even smaller than an atom. This kind of study faces many limitations.

Which is a practical way to overcome limitations in quantum mechanics?

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The answer is Create models

the answer to your question is:

c. complementary base-pairing

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

thats not even an aswer choice