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
With spanish. fill in the blanks with any noun (for numbers 1 and 2) and verb (for numbers 3 and 4) that would agree with me gusta (n). 1. me gusta el pero no me gusta el 2. me gustan los pero no me gustan los 3. me gusta en el comedor. 4. me gusta y en el club.