The correct option is
D Of
The given sentence talks about the judgement.
Of is used to indicate possession, relation, substance, cause or about. Thus option D is the correct answer.
Off is used to shoe detachment or separation. Hence option A is incorrect.
From is used to indicate movement, since, source, cause, separation, distance and protection. Thus option B is also incorrect.
By is used to indicate means, nearness, time, order, according
to, manner or instrument, measure, in the name of. Since this
preposition does not fit correctly in the given sentence, it is
incorrect.