You would say A. Voy a una jineteada.
If you want to say I am going, that is (Yo) voy in Spanish.
Vas is used for -you, va for -he/she/it, van for -they.
Blank 1 : correr
Blank 2 : comer
Blank 3 : comer
Blank 4 : beber
Blank 5 : leer
Blank 6 : escribir
Blank 7 : leer
Blank 8 : comprender