From the Lesson documentation Lesson_settings#Maximum_Number_of_Attempts:
Maximum Number of Attempts
Decide here how many times you want students to be able to attempt each question. When they reach the maximum, they will be taken automatically to the next page.
Wendi "[...] this system is not so useful if we can't require the students to at least see the correct answer."
If you want the students to see the correct answer to a question, whether they actually found it themselves (through one or more attempts) or not, then you could put that answer at the start of the text of the next page that the students will navigate to.