which of these is a tool used in software development?\ndebugger\nprototype\nplatform\nall of the above

which of these is a tool used in software development?\ndebugger\nprototype\nplatform\nall of the above
Answer
Brief Explanations:
A debugger helps find and fix errors. A prototype is a preliminary model for testing. A platform provides the environment for development. All are used in software development.
Answer:
D. All of the above