Which millenarian religious movement, founded by William Miller, predicted Christ's return in 1844, an event known as the 'Great Disappointment' when it failed to materialise?

• A Adventism
• B Millerism ✓
• C Jehovah's Witnesses
• D Mormonism

After the Great Disappointment, Miller's followers split into several groups, most notably the Seventh-day Adventist Church, which continues as a major Protestant denomination.