Correct option is D
Explanation of the Correct Answer: · The given sentence is in active voice (present simple with an opinion verb "think").
· The passive structure for opinion-based sentences is:
· Active: "People think the government will change the economic policies."
· Passive: "It is thought that the economic policies will be changed by the government."
Why Are the Other Options Incorrect? · (a) "People thought that the government will change the economic policies." → Incorrect; changes the tense to past.
· (b) "The government will think to change the economic policies." → Incorrect; changes the meaning.
· (c) "The government has been thinking to change the economic policies." → Incorrect; changes the tense and meaning.
Thus, the correct passive voice sentence is:
"It is thought that the economic policies will be changed by the government."