For the following speech sample, select the phonetic repertoire from the alternatives below: "bed" → [βɛe]; "face" → [fes]; "pen" → [pɛn]; "bean" → [βin]; "sheep" → [sip]; "soap" → [sop]; "monkey" → [mʌki]; "baby" → [βebi]; "lamb" → [wæm]; "yellow" → [jɛjo]; "red" → [wɛd]; "pack" → [pæck]; "rub" → [wʌb]; "four" → [fo].

• A. [m,n,b,p,d,k,β,f,s,w,j,i,e,ɛ,æ,ʌ,o]
• B. [m,n,b,p,d,k,β,f,s,w,j]
• C. [m,n,b,p,d,k,f,s,j,i,e,ɛ,æ,ʌ,o]
• D. [m,n,b,p,d,t,k,f,s,ʃ,j,ɹ,l,i,e,ɛ,æ,ʌ,o]

Answer: (A)

The main idea is to identify the phonetic repertoire—the set of distinct phonetic segments that appear across all transcriptions in the sample. To find it, list every unique symbol you see when you go word by word and then take the union of those symbols.

From the transcriptions in the sample, the distinct symbols are m, n, b, p, d, k, β, f, s, w, j, i, e, ɛ, æ, ʌ, o. This collection includes all the consonants and vowels that actually occur, including the separate vowels i, e, ɛ, æ, ʌ, and o, as well as the bilabial fricative β that shows up in several words, plus consonants like m, n, p, d, k, f, s, w, and j. Some transcriptions also show combinations like [βɛe], which contributes both ɛ and e, reinforcing that both symbols appear in the sample.

This exact set matches the provided answer because it contains every phonetic symbol that appears, with none missing and none extraneous. Other options either drop symbols that do occur or include symbols not present in any transcription (like t, ʃ, ɹ, or l).