MSV a running record

What is MSV with a running record

[@kristenc742]

using this for a final exam, thank you

[@Lovenaps]

Thank you 🙏

[@marielamadera1461]

Thank you so much !!!

[@rociomoreno9178]

Hello, and thanks for the video. MSV are marked as an errors? Because in a chart that I have, I see M and S underlined, but in the space where the teacher marks the errors I see just one error.