Answer: (D) All of these
Step-by-step explanation:
The red, yellow and the green color mainly represent the status of the project in which the green signal indicated that the project is on schedule and ready to start.
The green signal basically indicate all the given above options as the green light is to give consent or an approval to push ahead in the project. The term green signal indicating that Go ahead, complete and on track.
Therefore, Option (D) is correct.