Step 1: Understanding the reflexive form.
The sentence means “She is very strict with herself.” In Spanish, when referring reflexively to oneself with prepositions like “con,” we use “consigo” (with oneself).
Step 2: Grammar explanation.
- “Conmigo” = with me
- “Contigo” = with you
- “Consigo” = with himself/herself/themselves
Thus, “Ella es muy exigente consigo misma” means “She is very demanding with herself.”
Step 3: Analysis of options.
- (1) con sua → Incorrect; “sua” does not exist in Spanish.
- (2) con su la → Incorrect; grammatically wrong.
- (3) consigo → Correct; reflexive form used after prepositions.
- (4) con de → Incorrect; nonsensical construction.
Step 4: Conclusion.
Hence, the correct form is “consigo.”