Julia collects colored beads for craft projects. Of julia's beads, 4/9 are silver, 1/5 are gold, and 1/4 are blue. The rest of the beads are red. Which expression gives the closest estimate of the fraction of red beads Julia has?
A. 1-1/2-1/2-1/2
B. 1-2/3-1/3-1/3
C. 1- 1/4-1/4-1/4
D. 1-2/5-1/5-1/5