C. Either is a conjunction word
It releases endorphins but also used in yoga to decrease stress and relax body. Chose one of these based off context of the question
If we say simple predicate, this only refers to the main verb that is used in the sentence. So based on the given sentence above, the simple predicate is the word "arrived" and this is the main verb which describes the subject which is "nurse". Hope this answers your question.
Answer:
The answer for the first one is 3.
The answer for the second one is True
