nathalie1107
Thanks
sayantanc2k.
I think except D, all answers are possible.
(a) The test group responses prove there may be a market for colas blended with vinegar. --> This sentence can start a paragraph discussing how the new finding can make change to business decisions.
(b) The test group responses corroborate previous research with brain imaging, which had also shown that expectation can change the physical trace of neural activity. --> This sentence continues strengthening the effect of expectation but on a wider aspect.
(c) This experiment illustrates the need for further research before the impact of expectation on taste can be stated conclusively. --> This sentence can opens a paragraph about the limitation of the experiment.
(e) This experiment offers useful information to marketers, who may adjust brand labels to indicate changes in product formula. --> How the experiments can be useful in marketing practices.
In GMAT RC, the first paragraph (or the first 2-3 of lines of the first paragraph) often summarizes the theme of the passage - hence it is recommended that one starts reading the passage slowly and carefully and then increase the speed (skimming through) as soon as the theme is understood.
a. Here the theme is about the hypothesis that "expectation can alter the experience of taste itself" -
from this, the passage seems to be one on psychology/ science rather than on marketing (the italicized part shows how the thought process goes while one reads the beginning of an RC passage) . Hence it is unlikely that the passage would shift towards marketing abruptly.
c. Nothing in the experiment indicates that there is further requirement of tests. If there were some opposing results, one in favor of the hypothesis and one against, then it could be said that there is a requirement of further experiment.
e. As in a, this passage does not seem to be one on marketing, but on psychology.
Please let me know if you are not convinced with the above reasoning.