What did people eventually link immigrants with during WW1?

The outbreak of World War I greatly reduced immigration from Europe but also imposed new duties on the Immigration Service. Internment of enemy aliens (primarily seamen who worked on captured enemy ships) became a Service responsibility.

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Explanation:

bibliography and citations to credit the sources hope this you if not my deepest of apologize ^w^

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering