When a programmer creates an abstract data type, he or she can decide what values are acceptable for the data type, as well as what operations may be performed on the data type.

The abstract data type is a type of data type whose behavioural manner is always determined by a set of values and a set of operations.

Explanation:

These data types depend only on extracting the data and hiding the essential background data. That is why it is called an abstract data type.

It will not show how it is implemented, what algorithms are used and how the data is manipulated.

The abstract data type has three types

i)List ADT

ii)Stack ADT

iii)Queue ADT.

This is how an abstract data type works.

the correct answer is: a.)it is never appropriate to use acronyms and emoticons in business communication.