By comparing the width of the bands in the figure below (age of the ocean floor) defining each age interval, which of the following continents have spread apart fastest over the last -68 million years? (ma stands for mega-annum and refers to millions of years before present.) 60 -30 -60 270 300 330 210 240 150 180 120 60 90 30 120.4 131.9 147.7 180.0 83.5 33.1 47.9 55.9 67.7 0.0 10.9 20. 126.7 139. 1543 40.1 age (ma) africa - antarctica (along line a) australia - antarctica (along line b) south america - africa (along line c) all have spread at the same rate cannot be determined from the information given