Topic: Conjugation of Verb,

Best Answer Explained in Below-:

The past participle of "prophesy" is "prophesied," which is option C. To understand this, it's important to look at the structure of verbs in English. "Prophesy" is a verb that means to predict or proclaim something that will happen in the future, often in a religious or visionary context.

In English, regular verbs typically form their past tense and past participle by adding "-ed" to the base form. However, "prophesy" is an irregular verb; it displays different forms. The base form is "prophesy," the simple past tense is "prophesied," and the past participle is also "prophesied."

The other options provided do not relate to the verb in any way. For instance:
- A) "prophase" refers to a stage in cell division and is unrelated.
- B) "prophose" is not a recognized word in English.
- D) "proficiency" relates to skill or competence, and is distinct from the verb "prophesy."

Thus, option C, "prophesied," is the correct and only appropriate answer.