Answer: C. Both were influenced by Enlightenment thinking about equality.
For American and French Revolution the basic similarity is shown in the third option that is given.
Explanation:
Third option of the question tells us that the enlightenment ideas about equality was the basic root behind both American as well as French Revolution against the British colonies.
Both the revolutions evolved because people were fed up of imposition of Taxes, war and inequality that was existing and being ruled by some other authority in their own country was the major reason behind these revolts.