One reason many waterfowl die each year of lead poisoning is because they often ingest spent shotgun pellets.
In most cases, the answers choices incorrectly and illogically state "the reason... is because" instead of actually explaining what the reason is. "Reason..because" is more or less stating why the reason exists.
These answer choices make that mistake
(A) One reason many waterfowl die each year of lead poisoning
is because(B) One reason why many waterfowl die each year of lead poisoning
is becauseIn D, the sentence illogically communicates that the waterfowl die for a particular reason. As if they are dieing for a cause. E commits a similar mistake.
(D) Many waterfowl die each year of lead poisoning
for the reason that
(E) Many waterfowl die each year of lead poisonin
g because of the reason that
C clearly communicates that the waterfowl die each year and that the reason that they die is X
(C)
One reason many waterfowl die each year of lead poisoning
is that