Which of the following is closest in meaning to the underlined word "unfazed" in the last PARAGRAPH?

A
解析:最后一段第一句"Thecompany professes to be unfazed by the fact that many alumni will end up working else where"即许多学员在毕业后并不任职于麦当劳，而这家快餐业巨头宣称并不为此感到烦恼。 undisturb叫"坦然的"，infuriated"愤怒的"，unconcerned “漠不关心的"，frustrated"沮丧的"。根据文中意思，故选A。