How is a public essay different from a personal essay?

a. personal essays reflect the writer's opinion, while public essays state objective, historical facts.

b. personal essays are based on topics of personal significance to the writer, while public essays are based on topics of social relevance.

c. personal essays are meant to be published in biographies, while public essays are meant to be published in newspapers.

d. personal essays are addressed to literary circles, while public essays are addressed to a general audience.