In 1946,Eleanor Roosevelt served as a chair of the United Nation Commission on Human Rights
I think its b more complicated
The answer is a.. A colon is best used in advance of a new topic or point, and not in the midst of a sentence, as is the case with the other options.
Answer:
189.27 rounded to the nearest whole is 189.
15.8 rounded to the nearest whole is 16
11.2 rounded to the nearest whole is 11
189+16+11= 216