To reject D,
one reason mentioned above :
a substance to promote is wrong.
Can I also reject D
because it is ambiguous in meaning:a low dose of aspirin usually suffices to block production of thromboxane
which is a substance to promote blood clotting, but does not seriously interfere
Ambiguous meaning :
but doesn't can be implied in parallel
with suffices xx||
doesn't interfere because
which xx could be interpreted additional information for thromboxane.
Intended meaning : thromboxane <verb> but doesn't <verb>
This reasoning can help to reject some wrong options in other questions. Please share your opinions .
AndrewN AjiteshArun
Quote:
In laboratory rats, a low dose of aspirin usually suffices to block production of thromboxane, which is a substance that promotes blood clotting, but not seriously interfering with the production of prostacyclin, which prevents clotting.
(A) which is a substance that promotes blood clotting, but not seriously interfering
(C) a substance that promotes blood clotting, but does not seriously interfere
(D) which is a substance to promote blood clotting, but does not seriously interfere
. I do not think a strong case can be made for ambiguity of meaning in the way you have outlined. The comma before
Without the comma in question, the non-essential information about thromboxane would seem to continue instead:
I hope that clarifies your concerns.