Use the paragraph to answer the question. Both the French and the Spanish languages use the same basic 26 letters from the Latin alphabet, although the letters within the alphabet are used to create different words and sounds for each language. Both languages feature accent marks, two of which are the same marks. While both languages are two of the most popular in the world, estimates suggest that Spanish is spoken by 570 million people in total whereas French is spoken by less than half that many. Which organizational structure did the author use?
A: comparison and contrast
B: time order
C: order of importance
D: space order