how Conan Doyle uses dialogue to show the relationship between Holmes and Watson in the extract and the novel as a whole

adjectival phrase

Explanation:

An adjectival phrase refers to a group of words that is used to describe a noun or a pronoun in a sentence. Ir should be noted that the adjective can appear at the beginning of the phrasez at the middle or at the end of the phrase.

Here, the "stimulus" is used tongue further information about the experiment. Therefore, the correct option is C.