The correct option is C.
An infinitive phrase is a phrase that is made up of an infinitive form of a verb and complements and modifiers. An infinitive is a verbal that can function as a verb, adjective or adverb.
An infinitive is formed by using the word 'to' plus the verb. For instance, ' to go, to work, to run, etc.
Answer:
<h3><em>doubtful</em></h3><h3><em>indefinite</em></h3><h3><em>uncertain</em></h3><h3><em>unsure</em></h3><h3><em>doubting</em></h3><h3><em>dubious</em></h3><h3><em>faltering</em></h3><h3><em>hesitant</em></h3><h3>
Explanation:</h3><h3><em>questionable</em></h3><h3><em>unconfident</em></h3><h3><em>undecided</em></h3><h3><em>unfixed</em></h3><h3><em>unpredictable</em></h3><h3><em>unreliable</em></h3>
Is there a certain number of sentences you have to write ?