How Is Quantum Tunneling Important to Our Existence Here on Earth

Multiple Choice

How is quantum tunneling important to our existence here on Earth?

A) It explains how neutron stars are able to stay stable rather than collapsing under their strong gravity.
B) It explains why electrons in atoms gradually fill different energy levels,thus making chemistry possible.
C) It plays a crucial role in nuclear fusion in the Sun,so that our Sun would not shine brightly without it.
D) It is very important to understanding the law of conservation of energy.