Official Explanation:
The underlined portion of the sentence contains the words different from, so check for comparisons. The underlined portion of the sentence also contains an introductory modifying phrase, so check to make sure the correct nouns are being modified. The comparison is between the noun owners and the noun ordinances, comparing people to rules. This is a comparison error. The phrase different from owners of German shepherds, currently modifies town ordinances. This is a misplaced modifier error. Eliminate choice A and look for obvious repeaters. The answer choices all require some evaluation to determine their errors, so, there are no obvious repeaters. Now evaluate the remaining answer choices individually, looking for reasons to eliminate each.
Choice B compares owners to the clause there are none. These are not similar items, so this is a comparison error. Eliminate choice B. Choice C eliminates the direct comparison by changing the structure of the sentence to not compare two items. This choice also eliminates the modifier error by not including any modifying phrases. However, the choice creates a parallelism error as the verb require is not parallel to the verb phrase have been required. Eliminate choice C. Choice D eliminates the direct comparison by comparing ordinances to regulations, does not commit a misplaced modifier error, and introduces no new error. Keep choice D. Choice E eliminates the direct comparison entirely, but uses the phrase of owners of German shepherds to incorrectly modify ordinances, implying that the ordinances belong to these owners. Eliminate choice E.
Choice A: No. The owners are incorrect compared with ordinances. Comparison.
Choice B: No. The owners are incorrect compared with there are none. Comparison.
Choice C: No. Require and have been required are not parallel. Parallel construction.
Choice D: Correct.
Choice E. No. Of owners of German shepherds incorrectly modifies ordinances. Misplaced modifier.
The correct answer is choice D.