Option A consists of two independent clauses, therefore there's a coordinating conjunction in between them to help the sentence flow.
It's me Sopnila and your?
I am good and What about you?
cause-and-effect reasoning is mostly persuasive as it helps answer the question on <em>'how' </em> <em>one person, thing, or event causing another thing or event to occur </em> or <em>'why' something happens </em>making a statement objective and rational rather than a blind assertion/affirmation.
Hope this answer helps you, have a great day!
