What are the main benefits of using string expressions and string functions?

You want to develop a program that processes character type data. When you implement the program, you can either use the classical string statements or the newer strings expressions and functions.

What are the main benefits of using string expressions and string functions? There are 2 correct answers to this question.
A . You can write compact syntax instead of a long sequence of statements
B . You can write code that is very easy to read and understand
C . You can improve the performance significantly
D . You can reduce the number of intermediate variables

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Answer: A,D