Section $4$: OPM Difficult Questions

$16.$ What is the difference between a "career" and a "career$-$conditional" appointment in the federal government?

a$)$ A career appointment is permanent, while a career$-$conditional appointment is temporary.

b$)$ A career appointment requires a civil service examination, while a careerconditional appointment does not.

c$)$ A career appointment is only available to current federal employees, while a careerconditlonal appointment is available to external candidates.

d$)$ A career appointment is subject to a probationary period, whfle a careerconditional appointment is not.

Correct answer: a$)$ A career appointment is permanent, while a career$-$conditional appointment is temporary.

pls explain the answer