How did elements with more than 2 protons, such as the carbon in our cells, form? A. They were formed at the same time as hydrogen and helium right after the big bang.
B. They formed 400 million years after the universe formed in giant fusion reactors known as stars.
C. They are formed when lighter elements are pulled together by gravity to form a planet.
D. They formed from hydrogen and helium slamming into each other in the first few minutes after the big bang.