The correct options are
A Amoeba and WBCs use pseudopodia for locomotion.
B Amoeba and WBCs can change their shapes.
C Amoeba and WBCs have cell membranes.
Amoeba and WBCs have cell membranes and can change their shapes. Both of them use pseudopodia for locomotion and phagocytosis. Amoeba is a unicellular organism and can exist independently. WBCs, on the other hand, are incapable of independent existence.