Acarbon atom can bond to four other atoms because it has
a. four different cations.
c. two inner energy levels.
b. four valence electrons.
d. no protons in its nucleus.

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

answer; i do believe the correct answer is (river); /// good luck

i have no clue hope you find the answer