The correct answer is: B. third generation language
A third-generation programming language (3GL) is a programming language that enables a programmer to write instructions in a form closer to human language than that of a machine. 3GLs are also known as high-level programming languages.
Application generators are software tools that automate the process of creating applications. They do this by providing a set of templates and wizards that can be used to create the basic structure of an application.
Screen generators are software tools that automate the process of creating user interfaces. They do this by providing a set of templates and wizards that can be used to create the basic layout of a user interface.
Report generators are software tools that automate the process of creating reports. They do this by providing a set of templates and wizards that can be used to create the basic layout of a report.
Therefore, a third-generation language is not a tool for application prototyping.