Answer:
Well the answer is C and that's the truth.
Probably the ocean, seems interesting.
Answer:Smallpox and vaccination are intimately connected. Edward Jenner developed the first vaccine to prevent smallpox infections, and this success led to the global eradication of smallpox and the development of many more life-saving vaccines.
Explanation:
Sir John Harrington invented the flushable toilet in 1596, however the idea of a toilet has existed for thousands of years in much more primitive forms.
The Answer would be C. Austria-Hungary.