Answer: A) Infinitive.
Explanation: Inflection is the grammatical term for letters added to nouns, adjectives, and verbs to show their different grammatical forms. For example, the inflection of a verb can be "-ed" or "-d" to form its past tense (in regular verbs). An infinitive is a form of verb that appears in its basic form. It is preceded by a particle “to,” and can serve as an adjective, an adverb, or a noun. So the verb "to cry" is an infinitive. In present, third person singular, it would be "-es" (she/he/it cries), in past tense, it would be "-ed" (I cried) and in present participle it would be "-ing" (crying).
