Rewrite the sentence in indirect speech.
"Call the first witness," said the judge.

Correct option is D

Explanation: Direct commands in the imperative, such as "Call the first witness," are reported with the verb in the base form following "commanded to" in indirect speech, retaining the imperative's directive nature.
Grammatical rule used: Imperative commands are reported with "commanded to" followed by the base form of the verb in indirect speech.
Example: "Open the door," the officer said. -> The officer commanded to open the door.