Which One of the Following Is True of Software Development

Multiple Choice

Which one of the following is true of software development models?

A) There are always four test levels in the V-model.
B) In a Rapid Application Development (RAD) project, there are four test levels for each iteration.
C) In Agile development models, the number of test levels for an iteration can vary depending on the project.
D) There must be at least four test levels for any software development model.