(A) Many scientists are abandoning the idea of propagating “edible vaccines” inside fruits and vegetables; one reason is suggested by the observation that two individual fruits or vegetables of the same type are almost never the exact same size, while vaccine dosages must be exact. =
Correct(B) Many scientists are abandoning the idea of propagating “edible vaccines” inside fruits and vegetables; one reason is suggested by
there being almost no two individual fruits or vegetables of the same type that are the exact same size, while vaccine dosages must be exact. - Suggested by there being almost - is incorrect
(C)
Inside fruits and vegetables, one reason that many scientists are abandoning the idea of propagating “edible vaccines” is suggested by the observation that two individual fruits or vegetables of the same type are almost never the exact same size, while vaccine dosages must be exact. - Incorrect construction
(D) The observation that two individual fruits or vegetables are almost never the exact same size, while vaccine dosages must be exact, is suggestive of one reason that the idea of propagating “edible vaccines” inside fruits and vegetables
is being abandoned by many scientists. = Passive form. A is preferable over D
(E)
The observation of two individual fruits or vegetables being almost never the exact same size, with vaccine dosages needing to be exact, suggests one reason many scientists are abandoning the idea of propagating “edible vaccines” inside fruits and vegetables.[/quote] - The observation of fruits or vegetables is incorrect.