Sentence C is a good example of conflict. An animal rights activist tried to save the Bengai tiger from being hunted to extinction. The other sentences contain neutral connotations, making this the only conflicted sentence.
Eli Whitney was who invented the Cotton GIn
One could have many interpretations, such as a peace sign, people think hippies, equality, tranquility; however, with a personal symbol there is a more sentimental attachment, involving experience, trauma, or memories
Chapter 2 of the Great Gatsby opens with a literal description of the city dump, referred to as the "Valley of Ashes." The Dump is a symbolic representation of the american dream now left to decay on edge of the city fueled by materialism and greed. This related with the general theme of the story about self-centeredness and greed filling the world with trash.
Macbeth has been adapted so many times for the same reason why all Shakespeare's plays have been adapted so many times. It is because they are not bound to a single point in time and by changing temporal details it can be applicable to any society at any time. The theme that is "power corrupts" has been ever present and this is why it keeps getting adapted.