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 second one is grammatically correct
Answer:
Good evening ladies and gentlemen....
^That is the the part you need to choose^
Answer:
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<span>At the end of a text, a useful way to annotate is to make a list of the key points.
Annotation refers to some notes at the end of the text - so if you want to annotate your study properly, you should just jot down some of the things that you want to explain or comments that you may have regarding the text you've just written.
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