Question

which of the following are coordinating conjunctions? select all that apply. and however so therefore

Answer 1

The coordinating conjunctions among these are and and so.
However and therefore are not - they are subordinating. 

Answer 2

The ones that are coordinating conjunctions are "and" and "so".

Coordinating conjunctions are words that are used to join two or more words, phrases, clauses or sentences that can stand alone. In other words, this type of conjunctions connects phrases, clauses or sentences that have the same rank. Besides "and" and "so", there are other coordinating conjunctions:  "but", "or", "for", "nor" and "yet". On the other hand, "however" and "therefore" are not coordinating conjunctions: they are adverbs.