Sorry this came late, It would be I, I I, III.
Here you go, hope this helps. sorry for the bad handwriting
He will not come it rains.
Explanation:
Conjunctions are words that joins words, phrases, clauses or sentences.
Because, but, and, yet, or, nor, although, if, since, unless, while are some examples of conjunction.
It can make your paper more appealing to readers, and/or more informative for the readers as well.