I do not understad your question but in order to get what you ask, you can use the position option, it means to analyse the position of a word in a sentence to learn which part of speech it belongs to.
You can also you the replacement option, meaning you can replace a word with words from the same part of speech group.
1. C
2. B
3. C as something specific is talking about a person.
4. C
The answer is b.. I know cause I had that question