Which of the Following Options Lists the Events of Protist

Which of the following options lists the events of protist evolution in the correct order,according to current science?

A) Mitochondria and then chloroplasts evolved through primary endosymbiosis; later,protozoans were incorporated into several other groups of protists through secondary endosymbiosis.
B) Mitochondria and then chloroplasts evolved through primary endosymbiosis; later,algae were incorporated into several other groups of protists through secondary endosymbiosis.
C) Chloroplasts and then mitochondria evolved through primary endosymbiosis; later,algae were incorporated into several other groups of protists through secondary endosymbiosis.
D) Mitochondria evolved through primary endosymbiosis; chloroplasts then evolved through secondary endosymbiosis.