Answer:
The right answer is, C. Son; están.
* Pamela y la señora Hernando son amigas y están en la boda de Carlos.
Step-by-step explanation:
Because the subject in the sentence is in the second person plural and is being narrated in the present tense, therefore it is important to identify the subject, gender, time and number in a sentence. In this way we manage to conjugate the verb in a logical way and that it agrees with what is being expressed.