Generally speaking, "d.Language barriers" were not a problem faced by multi-ethnic countries in Africa after independence, since relative to some of the more serious problems, like genocidal violence, this was not an issue.
1. Peisistratus: swept in and took control to prevent anarchy, was a despot.
2. Cleisthenes: given dictatorial power in an effort to make peace among all citizens.
3. Solon: advanced democracy, reformed the Assembly.
Probably C. because it make more sense then any other answer.