A. Barnum employed outrageous stunts, repetitive advertising, and exaggerated publicity to excite international attention for such amusements as the public museum, the musical concert, and the three-ring circus.
b. Bailey, he made the American circus a popular and gigantic spectacle, so-called The Greatest Show on Earth.
Answer:
Bullion is money, specifically gold or silver that has been freshly mined but not cleaned and made into money.
Clues to the meaning include the fact that the kids need "3 dollars", the speaker doesn't know how they wanted all that "money" at one time, and they had to "raise" it, as in "raising money". When he says, "I hadn't any idea where to turn to raise all that bullion..." he means the 3 dollars.
Answer: We need background information
Explanation: what are the events?