When an author uses strong language it is usually because they are biased. A source written from a specific point of view may still be credible, but it can limit the coverage of a topic to a particular side of a debate. It's always better to make use of sources that show both sides of the story.
The correct answer for the statement above would be option C. Allusion is a figurative language which uses an expression to briefly or indirectly refer to a person, place, thing, event, idea or political significance.
