Answer:
D. eukaryotic is the correct answer.
Step-by-step explanation:
All members of the kingdom Protista are eukaryotic because they have a nucleus and membrane-bound organelles like all eukaryotic organisms.
Eukaryotic organisms are those organisms that comprise a nucleus and organelles and are surrounded by a plasma membrane.
Thus the All members of the kingdom Protista have the characteristic similar to eukaryotic.