The majority of protists reproduce most of the time.
a. sexually
b. asexually
c. by parthenogenesis
d. by self-fertilization
e. by making eggs

b. asexually

Explanation:

Protist Kingdom - Includes unicellular and eukaryotic organisms such as protozoa and certain algae. Protozoa (from Greek protos, 'first'; zoou, 'animal') are single-cell eukaryotes devoid of chlorophyll; live alone or forming colonies in the most varied types of environments; they may be aerobic or anaerobic and exhibit free life or associate with other organisms.

Protists reproduce mainly asexually. Cissiparity and twitching are very common. In some cases sporulation occurs, the type of reproduction in which a cell undergoes nuclear divisions followed; Each nucleus is then isolated with a part of the cytoplasm by constituting a new surrounding membrane. Thus, several smaller cells are formed, which in turn give rise to new individuals.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.