The answer to that question is c.
Based on the amino acid sequence data for the Cytochrome-C protein, chimpanzees and humans share an identical coding sequence. Another species identified on the chart that is similar to the two would be the Rhesus Monkey, with is completely identical with 0 differences to the humans/chimpanzees.
The correct option is D.
The statements in the excerpt of the March of the flag can be considered a biased source because no supporting reasons were given for the opinions presented. There is no reference whatsoever to any other widely accepted source of information which buttress the points offered by Senator Albert.