Assume 1 copy of newspaper A was sold and 0 copies of newspaper B was sold
P = Percentage of Copies A sold = 100
R = Percentage of Revenue from A = 100
By substituting the value of P we easily know that D is the only answer choice to equal 100.
I feel bad about disrespecting such a fabulous question so I will provide the complete solution as well, if it helps anyone -
number of copies of Newspaper A sold = a.
number of copies of Newspaper B sold = b.
100/P = (a+b)/a
100/P = 1+b/a
b/a = 100/P -1
100/R = (a+1.25b)/a
100/R = 1+5b/4a
substituting value of b/a
100/R = 1+125/P - 5/4
100/R = 125/P-1/4
100/R = (500-P)/4P
Answer is D.