Sangwook on August 17, 2015
I got the right answer by eliminating others. Could you please why the choice (A) is the one the author would be most likely agree with?
Correct me if I'm wrong. Here is my thought: I guess the (A) refers to "a weedy grass" on line 31. According to the passage, I think that author explicitly states that "a weedy grass grows much better with plentiful CO2 than do three other grasses," not with photosynthetic rates of that weed. Why do we logically infer the increased level of CO2 is in proportion to the increased level of photosynthetic rates on the second paragraph, not the first paragraph?
Melody on September 2, 2015
Sangwook on September 3, 2015