What should you include in the code?

You need to write a method that combines an unknown number of strings. The solution must
minimize the amount of memory used by the method when the method executes.
What should you include in the code?

A.
The String.Concat method

B.
The StringBuilder.Append method

C.
The + operator

D.
The += operator

Explanation:
A: String.Concat Method

Concatenates one or more instances of String, or the String representations of the values of
one or more instances of Object.