A periscope in a submarine helps in viewing those objects

Options

A. that are very far
B. that do not emit any light
C. that are below the surfaçe of water
D. that are above the surface of water

Explanation

### Step-by-Step Solution:

1. **Understanding the Function of a Periscope**:
- A periscope is an optical device that allows a person to see objects that are not in their direct line of sight. It uses mirrors or prisms to reflect light and provide a view from a different angle.

2. **Context of the Question**:
- The question asks what a periscope in a submarine helps to view. Submarines operate underwater and need a way to see above the water's surface without surfacing.

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