Concept:Identify the consonant sound made by the underlined letters, then choose the word that begins with the same consonant sound.
Explanation:In the word "what", the underlined letters "wh" are pronounced as /w/.
Option A "who" is pronounced /huː/, beginning with /h/.
Option B "write" is pronounced /raɪt/, beginning with /r/.
Option C "one" is pronounced /wʌn/, beginning with /w/.
Option D "whose" is pronounced /huːz/, beginning with /h/.
Therefore, only "one" has the same initial consonant sound /w/ as the underlined part of "what".
Answer:C. one