Which one of the following would typically have the narrowest continental shelf?

Question

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A tectonically active continental margin next to a deep ocean trench would typically have the narrowest continental shelf due to the steep slope and abrupt drop-off associated with the presence of the deep ocean trench. Trailing continental margins (A) tend to have wider continental shelves, while mid-ocean ridge and trench systems (B) are located in the middle of the ocean and are not associated with continental shelves. Atolls (D) are coral reef formations that typically form around volcanic seamounts and do not involve continental shelves.

Which One of the Following Would Typically Have the Narrowest