Look at the graph. Then answer the question. A graph titled 1929 Drop in Stock Market. The x axis shows dates from October 1, 1929 to November 20, 1929. The y axis shows the stock market average, from 0 to 400. On October 1, the market was around 350. It stayed steady through October 11, fell to 320 on October 21, fell to 220 by October 31, then fell to 200 after November 10, before rising to 250 on November 20. Which best explains what had happened by October 31, 1929, in the stock market? The market had a rally. The market had lost much of its value. The market had totally collapsed. The market had slowly inched upward.