¿te para la clase de baile? ¿con quién a. inscribimos, hablamos b. inscribí, hablé c. inscribiste, hablaste d. inscribió, habló

For this case we must complete the sentence according to the options given.

The questions refer to the second person singular, that is: You, which in Spanish is given by: Tú.

In Spanish, the indefinite preterit verb tense for the second person singular has the form:

Tú inscribiste

Tú hablaste

Thus, the complete sentence is:

¿Te inscribiste para la clase de baile? ¿Con quién hablaste?

In English it is translated as:

Did you sign up for the dance class? Who did you speak with?

Option C

corras is the only one that is informal but doesn't follow the suffix rule. correr is the verb. corre is the formal verb form. corra would be used as the formal is corre ended with an a.

your best bet would be corras, it's the only one that is informal but is still wrong