The correct answer is D. No error.
The sentence is grammatically correct. The verb “has been reported” agrees with the subject “the minister’s speech.” The preposition “to” is used correctly to indicate the destination of the report.
The other options are incorrect because they contain grammatical errors. Option A is incorrect because the subject and verb do not agree in number. Option B is incorrect because the preposition “to” is not used correctly. Option C is incorrect because the sentence is incomplete.