The third question in Access Control Basics 1.2 Guided Exercise appears to be bugged.
“3. At the end of the exercise, which of the following permissions does the lex.luthor account not have effective access for on the Leadership folder?”
None of the answers to this multiple choice question return as correct.
I can confirm, no answer is acceptable. There IS a correct answer configured, but the recent change from a single submit button to individual submit buttons may have triggered an error.
I will report this to Cybrary 
Much appreciated, I couldn’t figure out how to report it. Liking the change to the individual submit buttons, kinks will always have to be worked out.
This is fixed. The issue was specific to questions where two or more answers began with the same text (in this case, “delete”)
Interesting! Thanks for the update!
Off topic, but the “Challenge.zip” in Data Backup/Recovery Basics 1.3 is misspelled as “Callenge.zip”. Just a heads up.