Read the draft passage. Paragraph 1: (1) Engineers proposed restoring a damaged marsh by reshaping channels according to regional models. (2) Local fishers noted seasonal currents and shallow areas that the available measurements had missed. (3) The project team combined field surveys, model results, and the fishers' observations before finalizing the design. Paragraph 2: (4) The revised channels performed better during the first storm season and preserved access routes used by small boats. (5) The project gained accuracy by testing different forms of knowledge against the site. Revision task: The writer wants readers to see the principle illustrated by the passage. Which choice avoids both a detail-only claim and an unsupported generalization?