easy · Gre Verbal
In the Aldergrove orchard, apple trees sprayed with a new clay-based coating showed 30 percent less insect damage to their fruit than unsprayed trees in the same orchard. The orchard's owner concluded that the coating protects fruit from insects.
Which of the following, if true, most strengthens the owner's conclusion?
- The sprayed and unsprayed trees were of the same apple variety and age and grew in adjacent rows.
- The clay-based coating costs less per season than the chemical pesticide the orchard once used.
- The coating washes off the fruit easily whenever heavy rain falls on the orchard for several hours.
- Insect populations in the surrounding region vary considerably from one growing season to the next.
- Fruit harvested from the sprayed trees tasted no different from fruit picked in earlier seasons.
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