Which event marked the start of the nuclear arms race? a. soviet union's first test of an atomic bomb in 1949. b. united states' first test of a hydrogen bomb in 1952. c. soviet union's launching of sputnik 1 in 1957. d. cuban missile crisis of 1962.

According to the biography of harriet tubman you read, what physical trauma did harriet tubman experience as a young girl? a.) she was repeatedly raped by an overseer.b.)she lost the use of her left leg after it became stuck in a cotton gin.c.)she was beaten within an inch of her life by a slaveholder which caused her to suffer from memory lapses later in life. d.)she was hit in the head with a 2-pound iron weight by an overseer, which caused her to suffer from narcolepsy later in life.