Answer:
to discuss the title of your presentation
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.
Answer:
It depends what they like and ur budget but I believe it's good to give something meaningful to both of u that you can have f9r a long time like jewelry or maybe clothes, stuffed animals if they like it or matching things could also be good
Or I've seen a lot people using things to put a lot of pictures of their loved one as something they can always look at it really depends on the person
(hope this helped)