7. For what achlevemen has the Athenian statesman Clelsthenes been credited? desioning the first democratio structures serving for four terms constitutional reforms that opposed autocratic princlples supporting the rights of slaves to vote

## Step 1<br />The question is asking about the achievements of Cleisthenes, an Athenian statesman. Cleisthenes is known for his significant role in the development of Athenian democracy.<br />## Step 2<br />Cleisthenes is credited with designing the first democratic structures in Athens. This is a significant achievement as it laid the foundation for the democratic system that we know today.<br />## Step 3<br />The other options, such as serving for four terms, constitutional reforms that opposed autocratic principles, and supporting the rights of slaves to vote, are not directly associated with Cleisthenes. These options are not the primary achievements for which Cleisthenes is known.