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.

Hence D.

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.

P/100=a/(a+b)

100/P = (a+b)/a

100/P = 1+b/a

b/a = 100/P -1

R/100=a/(a+1.25b)

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

R=400P/(500-P)

Answer is D.

_________________

Rock On