I spent a long time and tried to disprove myself. Here it is.
OG46. A study commissioned by the Department of Agriculture showed that if calves exercise and associated with other calves, they will require less medication and gain weight quicker than do those raised in confinement.
(A) associated with other calves, they will require less medication and gain weight quicker than do
(B) associated with other calves, they require less medication and gain weight quicker than
(C) associate with other calves, they required less medication and will gain weight quicker than do
(D) associate with other calves, they have required less medication and will gain weight more quickly than do(E)
(E) associate with other calves, they require less medication and gain weight more quickly than
Verb tense shift, showed that…exercise and associate…, is used by ETS itself. I apologize for my mistake, and I must correct myself here. It seems to me that said that or showed that can be followed by present tense to state a direct quote or a fact.
However, I stand behind my theory that D is the answer because the verb tense in D is in the correct indirect speech format, and D uses schedule instead of it.
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