C. answer the least challenging questions first
because then you get those out of the way and have more time to focus on the harder questions.
During a test, it is generally best to C. answer the least challenging questions first.
During-Test Strategies
Research in cognitive science and psychology shows that testing, done right, can be an exceptionally effective way to learn.
To learn more about test, refer
https://brainly.com/question/8417793
#SPJ2