Which of the following are used as indicators of a strong market in the future?I. The advance-decline spread is increasing at a time when the advances outnumber the declines.II. The level of short interest is relatively high.III. The net difference of odd-lot purchases minus odd-lot sales begins increasing.IV. The trading volume increases in a declining market.A) I and II onlyB) III and IV onlyC) I, II and III onlyD) I, II, III and IV