A. Patriotic
This is the answer I think, because in the poem it's all about the nation and that it should rule the world.
Grim melancholy would be the answer
The correct sentence using objective case pronoun is CHOICE A. Mom sent him and his brothers outside to play.
Choice B should be : Could THEY take the train instead of the bus?
Choice C should be : They have been friends for years. (We can take Beth out of the sentence.)
Choice D should be : The people holding the banner were Rob and Susan (any name).