Pandora is a goddess (if we're talking about the same Pandora) and she's the goddess of misfortune. I would assume that the political cartoon would be showing that whomever was "running" for whatever position was a mistake.
D. The enemy is crafty, unscrupulous, experienced in deception.
This is the best choice. By calling the enemy crafty, unscrupulous, experienced in deception, Stalin is feeding the hatred the people have for the enemy. He is detailing the traits that are not desired and makes the people feel as though they are justified in their efforts to defeat the enemy. These details are also insulting to the enemy and could also be used to incite the enemy.
It is true that any interpretation that can be defended with evidence from the text is a valid topic for a critical essay.