Why is the quote "never succumb to the temptation of bitterness" accurate?

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.