Question

Genealogists consider old family records fascinating.

Answer 1

The correct answer is 'object complement' because it completes the object, which in this sentence is 'old family records'. 

Answer 2

Answer:

The answer to your question would be that fascinating functions as an objective complement.

Explanation:

An object complement, also called objective complement, follows a direct object. It may be a word or phrase that gives further meaning to the direct object.  What is more, an object complement can be a noun, a pronoun or an adjective. In the sentence above, the adjective fascinating is the adjective giving further meaning to the D.O, which is old family records.