Which set of words is most effective for teaching structural/morphemic analysis?

Teaching structural or morphemic analysis involves focusing on the parts of words—such as prefixes, bases, and suffixes—that contribute to their meanings. The correct choice features the words "pretest," "retest," "tested," and "testing," all of which provide rich opportunities for students to analyze and understand how different morphemes change the meaning of a word.

In this set, "pre-" is a prefix meaning "before," and "re-" is a prefix meaning "again." Both of these prefixes can be examined alongside the root "test," allowing students to infer the meanings of the complete words based on their morphemic components. Furthermore, the different forms of "test" related to verb tense—"tested" (past), "testing" (present participle)—also offer an opportunity to explore how suffixes function in altering verb forms. All these elements together help deepen students' understanding of how morphemes work within the English language.

The other sets of words, while they do feature some elements of word structure, are less effective. For example, "test," "tested," and "testing" only allow for a focus on variations of one root word without exploring different prefixes. The set "read,"