Professor Ratan suggested his student Ravi use standardized tests in his thesis paper. Also, the professor mentioned seeing that the test provides the same repeated outcomes done under the same...

Extracted text: Professor Ratan suggested his student Ravi use standardized tests in his thesis paper. Also, the professor mentioned seeing that the test provides the same repeated outcomes done under the same conditions. What is this concept called this? a) validity b) standardization c) reliability d) standard norms