What is the function of the relative pronoun in the clause?
Their hard work, without which we would know little of the past, is sometimes poorly rewarded.
A.object of a preposition
B.possessive
C.subject
D.direct object
Their hard work, without which we would know little of the past, is sometimes poorly rewarded.
A.object of a preposition
B.possessive
C.subject
D.direct object