Question

Using broad-spectrum weed killers on weeds that are competing with crops for sunlight, water, and nutrients presents a difficulty: how to keep the crop from being killed along with the weeds. For at least some food crops, specially treated seed that produces plants resistant to weed killers is under development. This resistance wears off as the plants mature. Therefore, the special seed treatment will be especially useful for plants that _____________ .Which of the following most logically completes the argument below?(A) produce their crop over an extended period of time, as summer squash does.(B) produce large seeds that are easy to treat individually, as corn and beans do.(C) provide, as they approach maturity, shade dense enough to keep weeds from growing.(D) are typically grown in large tracts devoted to a single crop.(E) are cultivated specifically for the seed they produce rather than for their leaves or roots.

Answer 1

(C) provide, as they approach maturity, shade dense enough to keep weeds from growing.

Step-by-step explanation:

According to the given information, the treated seeds produce the plants with resistance to weed killers. The young plants from these seeds are protected against the weed killers due to the resistance in them.

If these plants mature into the ones with a prominent canopy so as to produce dense shade around them, the weeds would not grow around these plants as sunlight is not available to support their growth and development.

Therefore, there would not be any need to use the weed killers for these mature plants as they themselves produce a micro-environment to prevent the growth of weeds around them.