a) Julia
The subject in this sentence must be female. This is because the adjective, ambiciosa, is female then the subject must also be female. Subject and adjective must always match each other in number and gender.
Hope this helped!
~Just a girl in love with Shawn Mendes
La respuesta es... Mi amigo (mira) la pizarra.
B) les basta
Explanation: it is the correct verb with the sentence.
