At high noon it might be difficult for most of the people to distinguish the sides of the world, be it east, west, north, or south. In order to be able to precisely identify the sides of the world, one can use a compass.
The compass is always showing towards north, no matter where you are in the world, so than it is easy to establish south, as it is opposite to north, and east is on the right side of the north, while west is on the left side of the north.
To distinguish east and west during the high noon, when it is hard to tell which way the sun will set, a person can use a compass. The correct option among all the options that are given in the question is the last option. A compass is an instrument that is used extensively for navigational purposes.
