GMAT Sentence Correction
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Source: GWD
Level: 4
By the same techniques used for genetically enhancing plants, making them disease- or pest-resistant, researchers have been able to increase the amount of protein in potatoes, sweet potatoes, and tobacco.
- A By the same techniques used for genetically enhancing plants, making them
- B With the same techniques to genetically enhance plants, so that they are
- C Employing the same techniques used to genetically enhance plants so that they are
- D Employing the same techniques to genetically enhance plants, which makes them
- E Employing the same techniques for genetically enhancing plants that make them