A "FORCE" is required to cause acceleration or cause an object to move.
Its both A and C because both A and C have only one type each so it can only be those two :)
The answer is 2 pairs. The carbon atom has 4 electrons and oxygen atom has 6 electrons. The purpose of shared electron is to get 8 electrons at the outer layer. So the carbon atom needs to share 4 electrons which is 2 pairs with oxygen to be stable.
