Help with Gene Mapping Practice Test - GRE Subject Tests

A scientist performs a series of experiments to determine the recombination frequencies between the following genes. He acquires the following data:

W-X: 3%

X-Y: 2%

Y-Z: 13%

Z-W: 8%

Which of the following choices places the genes in the correct order relative to one another?

If the recombination frequency between two genes is then the genes are most likely .