Answer:
The correct answer is the option A: only Contractor A is correct.
Step-by-step explanation:
To begin with, the design phase regarding a construction project involves the convertion of the idea and instructions into a creatable plan. Furthermore, this design stage counts with common but fundamental stages itself as well, including the schematic design, the design development, the construction documents and the construction administration.
Secondly, the shematic design is the first stage of the design phase for a construction project and it requires to understand what the client is looking for and to translate ideas into concepts.
Finally, the development design is the second stage of the design phase for a construction project and it involves many modifications to the original idea and also the approval of the conceptual design by the client in order to move forward to the next stage.