Which choice uses data from the table to most effectively support the researchers' conclusion?
A
The difference in average tadpole body mass was small between the low and medium population density conditions and substantially larger between the low and high population density conditions.
B
Tadpoles in the low and medium population density conditions had substantially lower average bufadienolide concentrations but had greater average body masses than those in the high population density condition.
C
Tadpoles in the high population density condition displayed a relatively modest increase in the average amount of bufadienolide but roughly double the average bufadienolide concentration compared to those in the low population density condition.
D
Tadpoles produced approximately the same number of different bufadienolide toxins per individual across the population density conditions, but average tadpole body mass decreased as population density increased.
Explanation
Correct answer: B.
Choice B is the best answer. This data shows that the tadpoles in the high-density pond (meaning those with the most competition) didn't grow as big as the other two groups but produced more bufadienolide.
Why the other choices are wrong
Choice A
Choice A is incorrect. This doesn't fully support the conclusion. It doesn't include any data about bufadienolide production.
Choice C
Choice C is incorrect. This doesn't fully support the conclusion. It doesn't include any data about growth.
Choice D
Choice D is incorrect. This doesn't fully support the conclusion. It doesn't demonstrate that the tadpoles in the high-density pond produced more bufadienolide overall. The fact that they didn't produce more kinds of bufadienolide isn't relevant to the conclusion.