Petri, who runs a Basque restaurant, wants his diners to have an authentic culinary experience. Thus, he wants to recruit qualified individuals of Basque origin for his restaurant. Petri can avoid a claim of national origin discrimination and still limit the job to individuals of Basque origin by showing that:

A. the Civil Rights Act of 1964 allows employers to discriminate against employees or applicants on the basis of their national origin without any legitimate cause
B. it is difficult for people with Basque ancestry to be employed in other jobs
C. US citizens view people with Basque ancestry as exotic
D. an applicant's ability to speak fluent Basque and understand Basque cuisine are bona fide occupational qualifications.