Write a question about the following article.

Johnny Hartman and John Coltrane did an album together , and that 's just amazingly beautiful . They just work so well together , have such amazing respect for each other in the way John Coltrane will sit back and let Johnny sing , then step up at just the right time . Their use of one another 's strengths is fantastic .

Question:
What can the reader infer about the musicians specialties from the author 's observation that their use of each others ' strengths was fantastic ?

(a). It is highly probable that the reader will think that the musicians produced distinct musical sounds .;
(b). It can lead the reader to think that one musician has a much wider range of skills than the other .;
(c). The reader may likely believe that one musician 's work is superior to the other 's .;
(d). None of the above choices .;