What Is the Main Reason for Singapore Airlines to Use

Multiple Choice

What is the main reason for Singapore Airlines to use multilingual in-flight surveys to collect complaints from their passengers?

A) Customers prefer to complain in their native languages.
B) Most of their Asian customers could not write or read English.
C) Japanese and other Asian customers are less willing to send in written complaints.
D) German and other European customers are less willing to complain if the complaint forms are not written in their native languages.
E) English native-speaker customers represent only a small percentage of their total number of passengers.