Followers of the Random Walk Hypothesis Believe That

Followers of the random walk hypothesis believe that

A) support levels and resistance lines, when combined with basic chart formations, yield both buy and sell signals.
B) the price movements of shares follow a "flag" formation such that charting prices can help an investor better time his or her security purchases.
C) the price movements of shares are unpredictable, and therefore security analysis will not help to predict future market behaviour.
D) security analysis is the best tool to utilise when investing in the share market.