OE



The blank is describing characteristics. The passage gives further insight by stating that some arise through experience and that [r]esearchers are interested in the nature versus nurture debate. This duality is reflected later in the sentence when it’s explained why these researchers use identical twins…separated at birth to explore this debate. Characteristics which arise through experience correspond to nurture, so the characteristics described by the blank should correspond to nature, so use “natural” as the word for the blank. Intractable is a poor match for “natural,” so eliminate (A). Choice (B), nascent, means just coming into existence, which sounds like it could match “natural” but does not fit because something does not have to be “natural” to be called nascent. Eliminate (B). Choice (C), erudite, means scholarly, so eliminate it. Choice (D) is a good match for the blank, so keep it. Choice (E), predilection, means a preference, so eliminate it. Choice (F) is a good match for the blank, so keep it. The correct answer is (D) and (F).