"Their" is correct, because it shows possession of the desk by someone else.
The correct answer is A.
We can tell this because England's rocky shore has beaten back Neptune, the god of the sea -- meaning England has long survived an onslaught from a mighty foe.
By saying that England has survived the "siege of watery Neptune," Shakespeare is saying England has previously withstood great threats.
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Answer B, because Candidate A is described with the most important things to become a school president
The superlative (or highest) form of small is smallest.