What forms do you stem change?

Question

A. Yo , Tú, Ella, Él, Usted, Nosotros, Vosotros, Ellos, Ellas and Ustedes
B. Yo, Ellos, and Nosotros
C. Yo, Tú, Ella, Nosotros, Ellos, Ellas, and Ustedes
D. Yo , Tú, Ella, Él, Usted, Ellos, Ellas and Ustedes

Answer 1

The correct answer is A. Yo, Tú, Ella, Él, Usted, Nosotros, Vosotros, Ellos, Ellas and Ustedes.

Stem-changing verbs typically change their stem in all forms except for the "Nosotros" and "Vosotros" forms in the present tense.