Which is the correct use of comparison?

The correct answer is (B) I'm at least as qualified as, if not more than, the other candidate. This option correctly employs the comparative structure "as...as" when expressing equality or minimum equivalence, followed by the phrase "if not more than" to indicate a potential higher degree. The key is to ensure that both parts of the comparison are grammatically complete and parallel. The phrase "as qualified as" correctly completes the first comparison. Option (A) "I'm as at least qualified as..." is redundant and grammatically awkward due to the misplaced "as." Option (C) "I'm at least as qualified, if not more than..." is incorrect because it omits the second "as" in the "as...as" construction, leaving the first comparison incomplete and grammatically unsound. The correct structure ensures clarity and proper parallelism in the comparison.