Answer: Option (A) is the correct answer.
Step-by-step explanation:
According to the octet rule, it has been stated that every atom or element must have eight electrons in its valence shell, that is, the outermost shell.
For example, atomic number of chlorine is 17 and its electronic distribution is 2, 8, 7. So, in order to attain stability chlorine will readily react with another atom to gain an electron.
Therefore, after gaining an electron there will be in total 8 electrons in chlorine's valence shell. Hence, it will follow octet rule.
Thus, we can conclude that the octet rule suggests that atoms want to complete their energy level.