The correct answer is A.
Greece has a low amount of precipitation and, as a result of that, the agricultural sector suffers from a lack of many natural resources. Also, it is important to say that its rural land ownership system, and the emigration of the rural community into urban areas or abroad are factors that hold back the growth of the agricultural sector are also a big problem for Greece's agriculture.
He is referring to the constitution.
It was established after WWII in order to make sure something like it would not happen again.
The map of it is right here
