Argentina has a lot of types food
Estan Caminando isn't the answer as because "estan" implies to be another person, but this isn't the case as it's only the man, the man isn't walking (caminando either)
He isn't shopping (comprando) and he isn't painting (pintando)
The only logical answer is he's cooking (cocinando) which is also heavily implied as him having the bowl and whisk
B.) Esta Cocinando is your answer
140,000 people lived in Tenochtitlan
Yo llegue temprano a la oficina esta manana.
Ella preparo el cafe ayer.
Todas las mananas, Maria y Marta caminan por el parque.
Nosotros descubrimos el dinero anoche
The correct answer is B.confundida (which translates to confused)