The quotation from the poem containing a coordinating conjunction is option C: “And sometimes they sacrificed to the old stone gods,”
A coordinating conjuction refers to a word that links two elements of equal grammatical rank and syntactic importance. That word is placed between words, phrases, clauses, or sentences of equal rank, e.g. and, but, or. There are seven coordinating conjunctions: for, and, nor, but, or, yet.