The Marketing Research Corporation of America Has Been Hired to Administer

The Marketing Research Corporation of America has been hired to administer a series of "yes/no" questions to shoppers in a local mall.If questions on a survey have only two possible answers (such as "yes/no" questions) ,this type of questions are called

A) open-ended questions.
B) double-barreled questions and open-ended questions.
C) close-ended questions.
D) fixed-alternative response questions.
E) closed-ended and fixed-alternative response questions.