Answer: The right answer is the D) Social Security.
Explanation: Just to elaborate a little on the answer, it can be added that the expression "third rail"— a reference to the third rail system, a method of providing electric power to a locomotive by means of an additional rail that can cause electrocution if someone touches it — is used in politics in order to refer to a highly controversial topic, which, if tackled by a politician, will certainly have a long-lasting effect (usually detrimental) on his or her career. Arguably coined by Kirk O'Donnell, assistant to the Democratic speaker of the House, Thomas O'Neill, during the Reagan administration, the full quote read: "Social Security is the third rail of American politics. Touch it, you're dead."
The amount of lands owned by Britain and France increased the rivalry with Germany who had entered the scramble to aquire colonies late and only had small <span>area of Africa.</span>
