The correct answer is B) they could participate in political decision making.
The right that applied to Athenian citizens in the 5th century B.C. was that they could participate in political decision making.
This period in ancient Greece can be considered of reformation. The Athenian leader Cleisthenes introduced for the first time the concept of democracy, in which people of Athens could elect their rulers. The citizens of Athens also participated in the political institutions that governed them