Portia is loyal because she is still willing to be around and is not disturbed by Brutus's sickly state.
Idioms exist in every language. They are words or phrases that aren't meant to be taken literally. For example, if you say someone has "cold feet," it doesn't mean their toes are actually cold. Rather, it means they're nervous about something. Idioms can't be deduced merely by studying the words in the phrase.
Answer:
Before leaving to sell the pearl, Juan Tomas warns Kino and Juana to get the best price for the pearl, and tells him how their ancestors got an agent to sell their pearls, but this agent ran off with the pearls. Kino had heard the story told as a warning of punishment against those who try to leave their station.
Answer choice B. contains the prepositional phrase "on January 20."