Is the city of Cary liable under the disparate treatment theory?

Among those who took the Civil Service Exam, Mr. Imelda received
the highest score on the written portion. Feeling confident, he
applied for a position with the city of Cary. The position required
the preparation of written reports and the handling of complaints
from the public, either by telephone or face to face. Mr. Imelda is
a native of the Philippines, and English is his second language.
When he was interviewed for the position, the interviewers had
difficulty understanding him because of his thick Filipino accent.
The city of Cary decided not to hire Mr. Imelda because the
interviewers believed that his heavy accent would impede his verbal
capability to respond to complaints, which was an integral part of
the position. Upon learning that he did not receive the job, Mr.
Imelda appealed through a number of channels. When these appeals
proved unsuccessful, he filed an action under Title VII of the
Civil Rights Act. He claimed he was discriminated against because
of his accent and, thus, his national origin. Question: 1. Is the
city of Cary liable under the disparate treatment theory? 2. What
could the city of Cary have done to mitigate the risk of this
claim? 3. What defenses are available to the city of Cary? Question
about Health care administration major