A portfolio is composed of two stocks, A and B. Stock A has a standard deviation of return of 18%, while stock B has a standard deviation of return of 24%. Stock A comprises 60% of the portfolio, while stock B comprises 40% of the portfolio. If the variance of return on the portfolio is 0.033, the correlation coefficient between the returns on A and B is _________.

• 0.584

• 0.140

• 0.351

• 0.234