Assigning the Label of "Mass Extinction" to an Extinction Event

question 19

Multiple Choice

Assigning the label of "mass extinction" to an extinction event requires

• A) a large number of extinctions.
• B) a reduced origination rate.
• C) a significant increase over the background extinction rate.
• D) all of the above

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Definitions:

American Expeditionary Force

The formation of U.S. military personnel sent to Europe during World War I to fight alongside the Allies against the Central Powers.

Western Front

A major theater of battle during World War I, stretching across Belgium and France, characterized by trench warfare and significant casualties.

French Officials

Personnel or authorities that govern, administer, or represent France at various levels of organization, from local communities to international relations.

United States Officials

Individuals holding positions of authority or public service in various branches of the U.S. government, including executive, legislative, and judicial roles.