Which of the Characteristics of the Malaria Parasite Plasmodium Listed

Which of the characteristics of the malaria parasite Plasmodium listed below reflect the evolution of mechanisms to evade the immune system?

A) The fact that the malaria parasite is a eukaryote.
B) The fact that infected cells remain in the blood vessels and out of the spleen because the malaria parasite expresses a sticky protein in its plasma membrane.
C) The fact that the malaria parasite has a nucleus and membrane-bound organelles.
D) The fact that the malaria parasite produces proteins.
E) The fact that the malaria parasite shows antigenic variation in its cell surface proteins.