A parallel sentence mentions the same grammatical expression twice. I would go with "D". 'Passed' and 'Demonstrated' are both past tense words that express the same past tense grammatical idea.
If you have more questions, feel free to ask me.
The answer would be A. speech.
A Proclamation is defined as "<span>a public or official announcement, especially one dealing with a matter of great importance." Of the options given, a speech would make the most sense as an announcement. </span>
