Answer: A
~ A Lidia, le gustaría salir contigo.
Lidia would like to go out with you.
~ ¿Porque?
Why ?
~Le gustas tú.
She likes you.
~Tú eres mi novia. Tu estás conmigo. No quiero salir con Lidia.
You are my girlfriend. You are with me. I don't want to go out with Lidia.
Explanation:
A- Contigo ; conmigo ~ with you , with me ~ CORRECT
B- contigo; con ella ~ with you, with her ~ FALSE
C- conmigo; contigo ~ with me; with you ~ FALSE
D- conmigo; con él ~ with me; with him ~ FALSE
