Bunuel
The Joneses are hoping that whomever threw the toxic leaves into their pasture was simply thinking the cows might like something green and leafy to munch on.(A) The Joneses are hoping that whomever threw the toxic leaves into their pasture was simply thinking the cows might like something green and leafy to munch on.
(B) The Joneses are hoping that whomever threw the toxic leaves into their pasture were simply thinking the cows might like something green and leafy to munch on.
(C) The Joneses’ are hoping that whomever threw the toxic leaves into their pasture was simply thinking the cows might like something green and leafy on which to munch.
(D) The Joneses are hoping that whoever threw the toxic leaves into their pasture was simply thinking the cows might like something green and leafy to munch on.
(E) The Joneses are hoping that whoever threw the toxic leaves into the pasture was simply thinking the cows might like something green and leafy to munch on.
The Joneses are hoping
- that whomever
- threw the toxic leaves
- into their pasture
- was simply thinking the cows might like something green and leafy to munch on.
X threw
blahblah The question is whether “X” is the subject or the object of the clause, meaning the "doer" or "receiver" of the action.
Clearly X is the doer. Therefore, "whoever" must be correct.
A, B, CIn (D)
Prior to "their", there are two noun/prounoun - "The Joneses", "whoever"
The pronoun "their" refers to plural entity - "The Joneses"
This changes the meaning to:
The Joneses are hoping that whoever threw the toxic leaves into [The Joneses's] pasture
Clearly this is not the intended meaning.
IMO, E