单选题：Data flow testing is a control structure testing technique where

Data flow testing is a control structure testing technique where the criteria used to design test cases is that they __. @[C](1)

A. rely on basis path testing
B. exercise the logical conditions in a program module
C. select test paths based on the locations and uses of variables
D. focus on testing the validity of loop constructs




A.rely on basis path testing
B.exercise the logical conditions in a program module
C.select test paths based on the locations and uses of variables
D.focus on testing the validity of loop constructs


答案：C