what did Siddartha Gautama do after seeing old age, sickness, death, and finally a holy man in the city streets??

A: vowed to rule hid people so that fewer would be sick and face old age and death in poverty.
B: shut himself up in the palace and refused to travel outside again.
C: took his riches from the palace and gave them to the needy in the city.
D: cut his hair, traded his robes, and became a religious seeker.

D: cut his hair, traded his robes, and became a religious seeker.