Economists Marianne Bertrand and Sendhil Mullainathan Found That Even When

Economists Marianne Bertrand and Sendhil Mullainathan found that even when resumes are otherwise identical,those with White-sounding names got callbacks one in ______ times,while the Black-sounding "applicants" got only one in ______.

A) 5;6
B) 5;10
C) 10;15
D) 10;30