Which of the following stem extenders can cause D-Deletion? A. -t- B. -s- C. -o- D. -i-

The question seems to be related to linguistics, specifically phonology, and the process of D-Deletion. However, without specific context or a source language, it's difficult to provide a definitive answer. In general, D-Deletion or any kind of phonological deletion is highly dependent on the rules of a specific language.

In English, for example, D-Deletion is not typically influenced by stem extenders like -t-, -s-, -o-, or -i-. Instead, it often occurs in specific phonetic environments, such as in certain clusters of consonants.

If the question is related to a specific language other than English, the answer could be different. For example, in some languages, certain suffixes or stem extenders might indeed trigger D-Deletion.

Without more context or information about the specific language in question, it's not possible to provide a more specific answer.