The correct answer is: B. String
A String variable is an instance of the String class. It is a sequence of characters that are enclosed in double quotes. For example, the following code creates a String variable named “hello”:
String hello = "hello";
The String class provides a number of methods for manipulating strings, such as the charAt() method, which returns the character at a specified index, and the length() method, which returns the number of characters in a string.
The other options are incorrect because they are not instances of the String class. A Button is a user interface element that can be used to trigger an action. A Character is a single letter, digit, or symbol. An Array is a data structure that can store a collection of objects.