Which sentence belongs in a summary of the selection? A The steamboat whistle helped people know when to leave.
B The threat of cholera led to panic and harsh conditions.
C Many of the water sources on the trail were contaminated.
D Some young men became ill after getting overheated while hunting buffalo

the answer is emerged from.

orpheus descended to hades, the world of the death to rescue eurydice. no mortal had ever done this before him, he survived because he was protected by the gods. the word "underworld" gives us a clue, he emerged from it like a whale emerges form sea for exemple.

this is the sentence that best shows that fast food restaurants are designed for using unskilled labor. 

a.read

that would be your awnser