Answer:
A. a root and a suffix
Step-by-step explanation:
The formation of a word is formed by the root and the suffix.
The root corresponds to the unchanging part of a word. It refers to the semantics of the word, its context of creation (formation) and its transformations until its current use. The root reference is the basic identification of a group of words by their graphic similarities.
Suffixes are (in isolation insignificant) elements that, added to a root, form a word. Its main feature is the change of grammar class that usually operates. Thus, we can use the meaning of a verb in a context where a noun must be used, for example.