Answer: Yo era agradable, joven y tranquila cuando era más joven. (feminine)
Yo era agradable, joven y tranquilo cuando era más joven.
(masculine)
Explanation:
This would be something equivalent to the Town Square or The Main market, and in Spanish this would be called "Plaza".
So for example, this place in Mexico City is called Plaza de la Constitución (although it's known as Zocalo to most)
Not 100% on this, but I thinks it's A.