In a complex organic synthesis reaction, a chemist uses a catalyst to selectively produce one enantiomer of a chiral product, R, over its mirror image, S. The reaction without the catalyst produces a racemic mixture (equal amounts of R and S). After performing the reaction with the catalyst, the chemist analyzes the product composition and finds that the enantiomeric excess (ee) of R is 40%. What is the percentage composition of R in the final product mixture? A. 20% B. 40% C. 70% D. 80%