The answer should be letter C.
He shot his arrow through the seven trees because it was a challenge. It was done to prove his strength, valor, and skill. Not only did it do that, but it also pierced a mountain, entered earth, made a circle and came through the other side and went back into Rama's quiver.
The technique that this sentence best illustrates is understatement.
Understatement means that you are not showing the full 'strength' of something, but it is rather understated - so here, the coach only said that 'he was glad' even though his team won the Super Bowl, which is a huge deal. So his emotions should have been way stronger.
Oh! the old swimmin'-hole! whare the crick so still and deep
Looked like a baby-river that was laying half asleep,
And the gurgle of the worter round the drift jest below
Sounded like the laugh of something we onc't ust to know
Before we could remember anything but the eyes
Of the angels lookin' out as we left Paradise;
But the merry days of youth is beyond our controle,
And it's hard to part ferever with the old swimmin'-hole.
