Answer:
C. rating scale test.
Explanation:
In a rating scale test, respondents are asked by researchers to rate either their products, services, or work on a scale, say one to ten. This type of test is used by researchers when they want respondents to place value on the features,products,service as contained in the questionnaire.
This type of test is also used to assess performance of employees, products,services etc inorder to achieve a particular goal.
Rating scale is also used to get more information about comparisons between two values hence an important survey method.