Elizabeth is a manager in the accounting department of an investment firm. She monitors the day$-$to$-$day financial transactions of the firm. She also collates, analyzes, and reports accounting information to her superiors. In the given scenario, Elizabeth can be traditionally considered to be $a(n)$

a$.$ black$-$collar worker

b$.$ staff manager

c$.$ ancillary worker

d$.$ blue$-$collar worker