Why Did Sir Edward Bullard's 1960's Fit of the 900

Why did Sir Edward Bullard's 1960's fit of the 900 m bathymetric contour show some areas of overlap between South America and Africa ?

A) The work was actually done by a graduate student and Bullard never checked the details before he published it.
B) Massive erosion has modified the entire coastlines since 200 Ma so it is a wonder they still fit so well.
C) Large volumes of sediment have accumulated in the deltas and fans from the Congo, Amazon, Parana, and Rio de Plata rivers to outbuild the continental shelves and slopes.
D) Inaccurate bathymetry was all that was available to him prior to our modern multibeam sonar techniques.