What is the default underlying type of each element in an enum?A ) ByteB ) Enum elements have no underlying type.C ) ObjectD ) intE ) String

The default underlying type of each element in an enum is D) int.

Here's a step-by-step explanation:

1. An enumeration, or enum, is a symbolic name for a set of values. Enumerations are treated as data types, and you can use them to create sets of constants for use with variables and properties.

2. The underlying type specifies how much storage is allocated for each enumerator. However, an enumeration member can have any value that its underlying type can represent.

3. By default, the underlying type of each element in an enum is int. This means that if you do not explicitly declare an underlying type for the elements in the enum, the compiler will automatically use int.

4. Therefore, the correct answer is D) int.