Understanding Grading Methods for Multi-select (M-S) questions

For determining how points are assigned to blanks, the following grading methods are available in the classic and new multi-select question experience:

All or Nothing - Learners earn full points only when all correct answers are selected and all incorrect answers are left blank. Learners cannot earn partial points.
Correct Selections - Points are evenly distributed across all answers. Learners earn partial points for each answer correctly selected and left blank.
Correct Answers, Limited Selections - Points are evenly distributed across correct answers only. The number of selections allowed is limited to the number of correct answers. Learners earn partial points for each correct answer selected.
Right Minus Wrong Selections - Points are evenly distributed across all answers. Learners earn partial points for each answer correctly selected and left blank. Learners lose points for answers incorrectly selected or left blank. Learners cannot receive less than 0 points.