The statement that shows a clear example of ethos is:A. Former director of NASA, Scott Sherrit, admits that there are higher priorities for government spending than space exploration.
This statement uses the credibility of a former NASA director, Scott Sherrit, to lend authority and credibility to the argument regarding government spending priorities. Ethos, one of Aristotle's rhetorical appeals, involves establishing credibility or authority by referencing the expertise or reputation of a credible source.
In this case, the reference to the former director of NASA supports the argument being made about budget priorities.