posted by Jeff .
Is the following sentence (a) fragment, (b) run on sentence, (c) commas splice, (d) complete sentence? Although zone-delivered pricing is a plan under which customers living outside the seller's primary trading area pay the cost of delivering their purchases to them
It's a fragment. You have a long introductory dependent clause, but no independent clause.
That is a verrrrrry long convoluted adverb clause.... therefore, a fragment.
Identify the complete adjective clause.
I elected to take astronomy, which is not a required course.