Derivational morphology in English utilizes prefixes and suffixes to change the meaning or the word class of a lexical base. Regarding the semantic and grammatical properties of English affixes, mark T for True or F for False:

(   ) The prefix "un-" can indicate the reversal of an action when attached to verbs, as in "untie" or "unlock."
(   ) The suffix "-en" is used to derive verbs from adjectives or nouns, signifying a change of state, as in "shorten" or "strengthen."
(   ) Prefixes in English are primarily used to change the grammatical category of the base word, such as turning a noun into an adverb.
(   ) The suffix "-ish" is used exclusively to denote nationality and can never be used to express an approximate quality or age.

After analysis, choose the alternative that presents the CORRECT sequence: