I’m thinking it would be C. This is because when listing you need to add commas. You make sure to put a comma before the word “and.”
Demonstrative...it is a pronoun that is taking the place of a noun...specifically the subject
<span>The nation's space program will be safer and better prepared in the future and will become a renewed source of pride, despite the setbacks resulting from the shuttle Challenger tragedy.Reagan just wanted to create a non disastrous plan to implement a better plan to avoid unnecessary issues within the space program</span>
to find synonyms i usually use thesaurus.com
They are in different tenses