C I believe. I hope this helps
You are driving in the left lane on a four-lane freeway and have to take the exit on the right. you should change one lane at a time to be in the exit lane.
There are every type of rules are for driving, so that what you should do in any situation. If everyone follows those rules and guidelines, the percentage of accidents became very low.
Valence electrons would be found in the outermost shell of atom models!
Hope this helps (:
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