Which of the following is true about photosynthesis?

AIt is an exothermic reaction.

BIt is an endothermic reaction.

CIt produces carbon dioxide.

DIt occurs in animals.

Atomic theory is

Asubject to change if new information is discovered.

Ba solution to the problem of differing isotopes.

Cunchangeable.

Da descriptive table that lists all of the elements.

Two nonmetals from Group 16 are likely to form a(n)

Ametallic bond.

Bdouble bond.

Cionic bond.

Dcovalent bond.