Yes it does it but sometimes a burden to write haha!
The correct answer is C indeed. You should always use pointing words. If you don't your paragraphs might be incoherent and may lack cohesiveness.
Should have used "are" instead of "is".
Right sentence " The beaches around here are some of the prettiest I've ever seen!".
I am pretty sure that <span>the relationship which seems to be true is w</span>hen ionic character decreases, electrical conductivity decreases. I consider this option as a correct one because electricity can only be conducted by flowing of ions which means the higher ions facilitates the <span>higher conduction you get. Hope it's clear.</span>