Concatenation of text can be done using A. Apostrophe (‘) B. Exclamation (!) C. Hash (#) D. Ampersand (&)

The correct answer is: D. Ampersand (&).

Concatenation is the process of joining two or more strings of text together. In programming, this is often done using the ampersand (&) operator. For example, the following code will concatenate the strings “Hello” and “World”:

String s = "Hello" & "World";

The result of this code will be the string “HelloWorld”.

The other options are incorrect because they are not used for concatenation. The apostrophe (‘) is used to indicate possession or to form contractions. The exclamation (!) is used to express strong emotion or to indicate a command. The hash (#) is used to mark a comment or to indicate a special character.