During which stage of transcription do the following processes take place?

1. RNA polymerase binds to the promoter.

2. The RNA transcript is released.

3. The RNA transcript extended.

• A. 1-termination; 2-initiation; 3-elongation.
• B. 1-initiation; 2-elongation; 3-termination.
• C. 1-elongation; 2-termination; 3- initiation.
• D. 1-initiation; 2-termination; 3-elongation.
• E. 1-termination; 2-elongation; 3-initiation.