Answer:
D). Antonyms.
Step-by-step explanation:
The authors provide context clues which are hints or clues that assist the readers to define the meaning of an unusual or unfamiliar word.
In the given example, the antonym('a word with the opposite or contradictory meaning of the given words') of 'propaganda' would best help the audience to define it. The opposite meaning('antonym') of propaganda is 'truth, fact, or reality' which is signaled by words like 'honest, fact-based reading.' It helps the reader define that 'propaganda' is 'biased or manipulated information intended to influence people' as the Guilder people were forced to read it who used to read facts or reality(opposite of 'propaganda') earlier. Thus, option D is the correct answer.