Question

In the statement, "Calvin sold his", which sentence component is missing?

A. A verb
B. A noun
C. An object
D. A subject

Answer 1

It would be C. an object

Calvin in this sentence is the subject (and noun) in the sentence.
Sold is the verb, written in past tense.

Answer 2

The answer is C. An object.

The sentence is incomplete because the subject (Calvin) sold (verb) something (it doesn't mention what), which is the verbal complement that is missing. In this case it is a direct object. The other options: A. A verb shows an action or state of being; B. A noun names something and D. The subject does or is something.