Read the passage:
As a child, Ashley was a bit of a brat. She always wanted to do things differently. When she grew up, she continued to do so, becoming the first woman in her family to graduate college and enroll in medical school with high hopes of becoming a pediatrician, a doctor who works with children.

Based on its use in the passage, what is the definition of the word brat?



immature child

determined person

unfriendly woman

female doctor