Select the option which best changes the given sentence from active passive voice:
The invigilator was reading out the instructions.
The given active voice is, "The invigilator was reading out the instructions."
In this the past continuous tense of was reading needed to be changes to were being read.
The active voice of "The instructions were read by the invigilator." is "The invigilator was reading the instructions."
Hence, option B is the correct answer.
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