1- The stress syllables are used to highlight the important words and concepts as in <em>To </em><em>speak</em><em> of </em><em>that </em><em>which </em><em>gives</em><em> thee </em><em>all </em><em>thy </em><em>might</em><em>? </em>(bold-faced parts are the stress syllables).
2- The (mostly) regular rhythm does highlight the overall emotional weight on the poem, just try it by reading it out loud as the stress syllables are easy to identify.
There is no evidence of sarcasm nor anger throughout the poem.
Because they are not using i or me.. and because you can hear his thoughts
( john felt...)
I belive the correct answers are: A and C
"Sweating in the heat, we had lost the whole day, dreading to be buried alive in the drifting sand."
"Sand in the scanty food, sand in the brackish water--water that was drunk lukewarm from a clammy, loathsome water skin."
Hope it helps
