Now the Fourth Most Important Crop Worldwide After Wheat, Rice, and Corn, Potatoes are Expected to Supply Even A Larger Share of the World's Nutritional Requirements

Question: Now the fourth most important crop worldwide after wheat, rice and corn, potatoes are expected to supply even a larger share of the world's nutritional requirements in the next century if genetic engineering can increase its immunity to disease and expand its range of growing habitats.

1. potatoes are expected to supply even a
2. potatoes will, it is expected, supply an even
3. it is expected that potatoes will supply an even
4. the potato is expected to supply an even
5. expectations are for the potato to supply even a

“Now the fourth most important crop worldwide after wheat, rice and corn, potatoes are expected to supply even a larger share of the world's nutritional requirements” - is a GMAT sentence correction question. These types of questions contain grammatical errors in the underlined sentence and we have to choose the correct statement from the options. GMAT sentence correction is a part of GMAT verbal.

Answer: D
Explanation:

The given sentence correction question is tested by the given-below rules:

• Parallelism
• Comparison of two elements
• Modifiers

Now the fourth most important crop worldwide after wheat, rice, and corn, potatoes are expected to supply even a larger share of the world's nutritional requirements in the next century if genetic engineering can increase its immunity to disease and expand its range of growing habitats.

(A) Wrong - the topic "potatoes" doesn't consider the opening modifier. "Even" is an adverb modifying the infinitive "supply", so it carries a "still, yet" definition. The adjective form is also idiomatic. Basically, it sounds funny.
(B) Wrong - major comma splice issue; two sentences can not be joined by commas. it had been switched to trick test-takers who mistakenly think a non-restrictive clause protects clauses like these. nonrestrictive clauses had to be a phrase and never a clause.
(C) Wrong - This inverted phrase structure in this sentence is unnecessarily confusing.
(D) Correct - The opening modifier and subject are the same in number. "an even" expresses an equal quantity rather than the "still, yet" adverbial definition.
(E) Wrong - The opening modifier in this sentence is a dangling modifier. The inverted structure in this sentence isn't needed, causing analogical predication.

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