A. America tormented by the controversial conflict and did not offer the warmth, gratitude, and enthusiasm enjoyed by soldiers that returned from other military actions
Meaning error. Because of the way the parallelism exists in this, it means that veterans did not offer warmth, gratitude etc.
INCORRECTParallelism issue. "tormented by the controversial conflict" modifies America correctly but "did not offer warmth" refers to veterans instead of America.
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B. America tormented by the controversial conflict and offered no warmth, gratitude, and enthusiasm enjoyed by soldiers that returned from other military actions
Meaning error. Because of the way the parallelism exists in this, it means that veterans did not offer warmth, gratitude etc.
INCORRECTParallelism issue. "tormented by the controversial conflict" modifies America correctly but "offered no warmth" refers to veterans instead of America.
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C. America, which had been tormented by the controversial conflict, and did not offer the warmth, gratitude, and enthusiasm enjoyed by soldiers returning from other military actions
Again, "did not offer the warmth, gratitude.." refers to veterans instead of America.
INCORRECT____________________________________________________________________________________________________________________________
D. an America that had been tormented by the controversial conflict and that did not offer the warmth, gratitude, and enthusiasm enjoyed by soldiers returning from other military actions
Noun + noun modifier is constructed correctly. Parallelism is correct and "that did not offer the warmth" correctly refers to America.
CORRECT____________________________________________________________________________________________________________________________
E. an America that had been tormented by the controversial conflict and did not offer the warmth, gratitude, and enthusiasm to be enjoyed by soldiers returning from other military actions
Meaning error again.
INCORRECTHence option D