C is the answer.
It says on the third picture that Bohr refined Rutherford's model by giving distinct orbits for the electrons with distinct radii.
The answer is P
You can count how many electrons in the picture
Or you can search for the one who has 3 electrons in the outer shell
Molecular weight of oxygen is 15.998g therefor 1.5(2*15.998)=47.994g
Answer:B random mutations
Explanation: Because I took the test