According to the passage, a 'hygiene factor' (line 13) is an aspect of a worker's performance that ______.
A.
has no effect on the rating of a worker's performance
B.
is so basic to performance that it is assumed to be adequate for all workers
C.
is given less importance than it deserves in rating a worker's performance
D.
if not likely to affect a worker's rating unless it is judged to be inadequate