Roger works with Thanh Li, a recent immigrant from Vietnam. Roger considers Thanh Li a friend, but when co-workers exclude Thanh Li from the company softball team because they are prejudiced, Roger says nothing and goes ahead and plays on the team. Merton's classification of Roger is a(n):

a. unprejudiced discriminator.
b. unprejudiced nondiscriminator.
c. prejudiced nondiscriminator
d. prejudiced nondiscriminator.
e. prejudiced discriminator.
f. unconscious discriminator.