Neither the president nor the vice president were concerned about the pervasive negative comparison between their own corporation's environmental policy and their main competitor's.
Meaning of the sentence: The President and vice President were not concerned about the negative comparison between their own corporation's environmental policy and their main competitor's.
Errors in the original sentence: Singular subject( the vice President ) should have singular verb.
Rule for Neither X nor Y - Verb should agree to the closest noun(here, it's Y)
A) Neither the president nor the vice president
were concerned about the pervasive negative comparison between their own corporation's environmental policy and their main competitor's.
Subject-verb agreement errorB) Neither the president nor the vice president
were concerned about the pervasive negative comparison between their own corporation's environmental policy and their main competitor's policy.
Subject-verb agreement errorC) Neither the president nor the vice president was concerned about the pervasive negative comparison
between their own corporation and their main competitor's environmental policy. Comparison error. Here, the comparison is between own corporation and the competitor's eenvironmental policyD) Neither the president nor the vice president was concerned with the pervasive negative comparison between their own corporation's environmental policy and their main competitor's.
Correct
Singular subject (the vice president) agrees with the singular verb(was)E)
Both the president and the vice president were unconcerned about the pervasive negative comparison between their own corporation's environmental policy and their main competitor's.
Meaning change