Concept:This question tests the consonant sound /w/.
Explanation:The underlined letters in the correct option should produce the same consonant sound as /w/.
In
rowdy, the "w" is part of the vowel sound /aʊ/, not a separate consonant /w/.
In
bow, "ow" is pronounced as /aʊ/ or /oʊ/, so it does not contain /w/.
In
wrench, the initial "w" is silent, so the word begins with /r/.
In
quiet, "qu" is pronounced as /kw/, which contains the consonant sound /w/.
Answer:C. quiet