Question

Five Kingdom Classification
During the evolution of eukaryotes from prokaryotes, which
of the following did not occur?
(a) Infolding of the flexible cell membrane
(b) Loss of the cell wall
(c) A switch from aerobic to anaerobic metabolism
(d) Endosymbiosis of once free-living prokaryotes​

Answer 1

I am not sure but I think it's answer is c=a switch from aerobic to anaerobic metabolism