I think it’s metro, since it’s directly connected to the government or third party under government restrictions or guidelines. It says “most economic,” so taking the metro would probably put more money into the economy than a bus, and definitely more than a bike.
Not to do: Kiss people Gritarle al público Contar el final de la película Explicar los efectos especiales Hablar durante la película Llegar tarde Vestirse mal
To do: Darle una estrevista Firmar autógrafos Llegar temprano Vestirse bien