I would say that the parallel list here is C) a lost puppy, a colored poster, and a happy boy.
This is because all words have an article <em>a, </em>and an adjective in front of them, so they are parallel.
This passage has a melancholic mood. You can tell this due to some specific key words: "dull", "dark", "soundless." They all have a negative connotation. The imagery of a lone rider in a dreary and dull country under the oppressive sky may clue you in that the overall passage has a sad tone to it. Even later in the passage the author states that the scene is melancholic.
It's d. <span>Weeks of bottled-up tensions would be released in a few minutes of orgiastic violence, men screaming and shouting obscenities above the explosions of grenades and the rapid, rippling bursts of automatic rifles.</span>
B. Excitement........................................................................
<span>This is a phrase by Bernard Shaw, Act 3 of Pygmalion.
He is describing how ill-natured sober men can be, and how their wives make them drunk in order to make them happy and to "make them fit to live with."</span>
