Which of the Following Is the Best Example of the "Salmon

Which of the following is the best example of the "salmon bias"?

A) An immigrant grandmother has been diagnosed with terminal cancer and decides to head back to her home country to live out her last days.
B) People tend to congregate close to their heritage cultures due to familiarity and a need for social connection.
C) Bears on the West Coast of North America have a preference for Pacific salmon more than bears on the East Coast of North America.
D) Salmon tend to congregate in the places where they spawned.
E) Chinatowns are established in cities around the world.