How is the structure of "Past and Present Ships" different from the structure of "The Impact of Boating?"

A"Past and Present Ships" uses a cause and effect text structure to show the impact of ships on the world, while "The Impact of Boating" uses a chronological order text structure to show the laws put into place to protect the environment.
B"Past and Present Ships" uses a chronological text structure to show the development of navigation tools over hundreds of years, while "The Impact of Boating" uses a problem and solution text structure to show the laws created by the government to make boating better for the environment.
c"Past and Present Ships" uses a compare and contrast text structure to show the similarities and differences between ships used by early explorers and those used now, while "The Impact of Boating" uses a cause and effect text structure to show the damage boating does to the environment.
D"Past and Present Ships" uses a problem and solution text structure to show how problems faced by ships were solved, while "The Impact of Boating" uses a compare and contrast text structure to show healthy and unhealthy waterways.