2D5) Financial theory states that: studying historical stock price movements to identify mispriced stocks: A. is effective as long as the market is only semi-strong form efficient. B. is effective...

2D5)  Financial theory states that: studying historical stock price movements to identify mispriced stocks:
A. is effective as long as the market is only semi-strong form efficient.
B. is effective provided the market is only weak-form efficient.
C. is ineffective even when the market is only weak-form efficient.
D. becomes ineffective as soon as the market gains semi-strong form efficiency.