Conjunctions are words used to connect other words, phrases, or clauses. There are three main types of conjunctions:
Coordinating conjunctions - used to connect two elements (words/phrases/clauses) of equal grammatical rank and importance (e.g. two independent clauses).
Subordinating conjunctions - used to connected elements of unequal rank and importance (e.g. one independent and one subordinating clause).
Correlative conjunctions - used in pairs to connect elements of equal importance (e.g. <em>both/and, </em><em>either/or</em><em>, neither/nor, not/but</em>).
Based on this information, we can conclude that the correlative conjunction in the given sentence is<em> either/or. </em>
In general, yes, it is true that many people agree that Greek Romance and Spanish adventure stories are really early forms or novels, but of course there is some disagreement. <span />