When you add an additional correct selection to MC question and rescore, learner with that new selection receives points, but red X is still displayed.
Steps to reproduce:
1. Create MC question with 1 correct answer
2. Answer the problem incorrectly
3. Note 0 points and Red X as expected.
4. Edit question so that the choice that was selected is now a correct option.
5. Rescore the problem using the "Rescore only if Score improves" button.
Expected Result: Points given and green checkmark displays with rescore
Actual result: Points are given, but the Red X is still displaying.
6. As a learner, click "Show answer"
Expect: Points given, green checkmark next to all correct answers.
Observed: Points given, green checkmark next to other answers, and a double red x next to the learner's selection. Harsh!