The correct answer is C. He exclaimed what a beautiful scene it was.
The sentence “He said, ‘What a beautiful scene!'” is an exclamation. An exclamation is a sentence that expresses strong feeling, such as surprise, joy, or anger. In this case, the speaker is expressing surprise and admiration at the beauty of the scene.
The other options are incorrect because they do not express the speaker’s strong feeling. Option A, “He said that what a beautiful scene it was,” is a statement, not an exclamation. Option B, “He wondered that it was a beautiful scene,” is a question, not an exclamation. Option D, “He exclaimed that it was a very beautiful scene,” is an exclamation, but it does not express the speaker’s surprise and admiration as clearly as option C.