Paragraph 3: He called for proof of the protectionist view that visitations of the ants confer protection on the plants and that in the absence of the insects a much greater number would perish or fail to produce flowers or seeds than when the insects are present. That we now have an abundance of the proof that was called for was established when Barbara reviewed the relevant evidence in 1977, and since then many more observations and experiments have provided still further proof that ants benefit plants.
5. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information
A. We now have ample proof that ants benefit plants.
B. Barbara Bentley has called for additional proof that ants benefit plants.
C. In 1977 Barbara Bentley conducted research that proved that all prior studies were wrong.
D. Proof that ants benefit plants will require many more observations and experiments.
正确答案A。
我们现在有了大量的证据，这是在1977年芭芭拉审查相关证据时建立起来的，自那时以来，更多的观察和实验进一步证明了蚂蚁有益于植物。
A选项是该句的精确改写。
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