The statement that best describes the outcome of the Boxer Rebellion is:
"While some reforms were made after the Boxer Rebellion, the Qing Dynasty was weakened enough to collapse within 20 years."
The Boxer Rebellion (1899-1901) led to a military intervention by the Eight-Nation Alliance and resulted in significant consequences for the Qing Dynasty, including the signing of the Boxer Protocol in 1901. While some modernizing reforms were attempted following the rebellion, the Qing Dynasty was unable to recover from its weakened state, leading to its eventual collapse in 1911.