______ , the bridge's original supports were replaced with reinforced steel beams to prevent further deterioration.
Which choice completes the text so that it conforms to the conventions of Standard English?
- Acheck_circle
After engineers inspected the structure quarterly
- B
Inspecting the structure quarterly
- C
Quarterly inspection of the structure
- D
Having inspected the structure quarterly
Explanation
Only choice 2 supplies a clear subject ("engineers") for the inspecting action. The participial options dangle: supports do not inspect themselves.