Which of the Following Best Explains 'Pilot Production Stage

Multiple Choice

Which of the following best explains 'pilot production stage'? 

A)  Several pre-production series are manufactured and investigated and inspected. 
B)  The product design is translated into a number of prototypes or laboratory models. 
C)  The conceptual design is translated into a technical design. 
D)  The new product idea is translated into a first conceptual design.