A Large Commercial Landscaping Service in the Southwest Requires All

A large commercial landscaping service in the Southwest requires all Hispanic applicants for crew boss positions to have a U.S.high school diploma.Native English speakers are not required to have a high school diploma.The stated business purpose of this requirement is to insure that the Hispanic applicants speak English well enough to perform the job.This is an example of

A) disparate treatment.
B) a bona fide occupational requirement.
C) disparate impact.
D) a business necessity.