A、A noun. B、An adjective. C、A verb. D、An adverb. B

The Oxford Dictionaries website told readers post-truth could be “one of the defining words of our time”. The term comes from an idea that became popular during the 2016 election campaign in the United States. Post-truth, as the website defines it, means to relate to situations where “objective facts are less influential in shaping public opinion than appeals to emotion and personal belief”. (1)Oxford Dictionaries officials said they chose post-truth as Word of the Year because of its rising popularity. They said the term’s usage appeared to increase 2,000% in 2016 alone. Casper Grathwohl is the president of Oxford Dictionaries. He said that the choice was no surprise after a year filled with difficult discussions about politics. Grathwohl said post-truth has become popular at a time when more people are using social media to get news. Some people trust social media more for news and information than establishment media or political leaders.
If you plan to use the word, (2)Oxford Dictionaries defines it as an adjective. An example of it is the expression “post-truth politics” .
Questions 1 and 2 are based on the news report you have just heard.
1.Why did Oxford Dictionaries officials choose post-truth as Word of the Year?
2.What part of speech is this word “post-truth” according to Oxford Dictionaries?