The correct answer is C. past tense.
Past tense is a grammatical tense used to describe an action or event that is done in the past. "Mixed" has a regular form "mix" and by adding "-ed" to it, it becomes a past tense.
Mandy failed to beat her final opponent, Even though she practiced karate every day.
A character’s interactions and feelings shape their personality, goals, etc. Knowing when and how they interact is essential.