You can also accomplish this with the "Regular Expression Match" submission option. For example, if the correct answer is "Yes" and you don't care about capitalization, but do care about spelling, type "[yY][eE][sS]" as the answer. Or, if you only want to worry about the first letter being capitalized or not, "[yY]es".
I agree, however, that this solution should be overkill, and allowing us to set the Levenshtein distance to zero and/or a case sensitive toggle for the "Exact Match" would be much more intuitive. Especially considering that typing this out becomes tedious for longer answers like "grasshopper" and longer.
The reason I suggest this here, is because the Exact Match + multiple options ends up showing students all the options in a list as feedback, and some students get confused. On a New Quiz I made, a student saw the "Correct Answer: YES, Yes, YEs, YeS, yES, yEs, yeS, yes" feedback after their first attempt and put "YES, Yes, YEs, YeS, yES, yEs, yeS, yes" into the box for their final attempt, which was marked wrong.