the answer is
Estaba en España, específicamente en la ciudad de Madrid.
Okay so. Ser has many forms of putting it
Yo-Soy
Tu-Eres
El Ella Ud.-Es
Nosotros-Somos
Vosotros- Sois
Ellos Ellas Uds.-Son
I don't know if i answered right.
none of the above
Explanation:
because por is usually used to express cause or something
Do u want to translate it to spanish because if u do it tanslate as " Which of these animals is a cat"