Nobody knows what exactly causes canker sores, but many things may contribute to their development, such as certain medications, trauma to the mouth, poor nutrition, stress, bacteria or viruses, lack of sleep, sudden weight loss, and certain foods such as potatoes, citrus fruits, coffee, chocolate, cheese, and nuts.
civil rights movement definition. The national effort made by black people and their supporters in the 1950s and 1960s to eliminate segregation and gain equal rights.
Civil Rights Movement. the civil rights movement ended racial discrimination. Martin Luther King Jr. Lesson. Civil Rights Movement. the civil rights movement ended racial discrimination.