Here are the correct descriptions for each ruler:
Maria Theresa:
- improved the nation's tax system
Frederick II (Frederick the Great):
- led the army to victories over Austria and expanded territory
- allowed freedom of speech
- supported the use of vaccines for illness
So, to summarize:
- Maria Theresa: improved the nation's tax system
- Frederick II: led the army to victories over Austria and expanded territory, allowed freedom of speech, supported the use of vaccines for illness