Cleisthenes and Solon made significant contributions to the development of Athens, but from your options, the correct contributions are:
- ensured representation of all citizens in the government (attributed to Cleisthenes, who is known for establishing a system of democracy)
- ended the practice of enslaving debtors (attributed to Solon, who instituted reforms that relieved debt burdens and abolished debt slavery)
The option regarding granting political rights to noblewomen is incorrect, as neither Cleisthenes nor Solon granted political rights to women.