Which 1999 horror film used a groundbreaking viral marketing campaign that pretended the events in the movie were real, including fake 'missing persons' posters and a mockumentary website?

The film industry has seen some revolutionary advertising campaigns that transformed movies from potential flops to blockbuster successes. Marketing teams sometimes employ unconventional strategies that generate massive buzz and curiosity. This poll tests your knowledge about one famous campaign that changed the trajectory of a horror film and established a new benchmark for viral movie marketing.

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The Blair Witch Project
The Sixth Sense
Scream 3
The Ring