Hi, I know this is an old test and this discussion petered out a few years ago; nevertheless I'm going to take a stab at answering it. (A) is incorrect because the text only tells us that crop rotation makes plants less susceptible to the phytopathogens that cause lower yields. Lines 7-8 say, Crop r...

Hi @tz_strawberry, The trick here is seeing that the proponents are trying to downplay their meddling: the procedure alters only one gene, 'thereby rendering it safer than the phytopathogen from which it was derived' (Lines 44-45). In other words, they're claiming it has one effect and one only, nam...

Alvanith Wrote:
Could anyone help me with this?

You don't need it. That's the right diagram!

Thanks to rinagoldfield for breaking apart the problem! I can much better understand why (D) is right.