Q:

Select the most appropriate indirect form of the given sentence.

“Press button A to start the machine,” said the instructor to the trainees.

• 1
  The instructor said to the trainees that you should press button A to start the machine.
• 2
  The instructor told the trainees to press button A to start the machine.
• 3
  The instructor requested the trainees press button A to start the machine.
• 4
  The instructor told the trainees that pressing button A would start the machine.