If an investment is considered “volatile”, it a) the investment will experience rapid growth over time. b) the value of the investment may be hard to predict. c) the investment is high-risk, and its price will increase quickly. d) the investment is undervalued and may increase over time.

B) the value of the investment may be hard to predict.

Volatility refers to the statistical measure of how likely a market is to rise or fall sharply in a short period of time. When times are "volatile," investors tend to invest less or in safer ways.

Some degree of volatility is inevitable, as markets naturally move up and down. However, an investment is considered "volatile" if the value of the  investment within a short period of time is particularly difficult to predict.

answer; i believe the correct answer is (4) flip a coin as each participant arrives,heads indicates assignment to the first group: tails indicates assignment to the second group;