Asset 1 has a standard deviation of returns of 0.15 while Asset 2 has a standard deviation of returns of 0.20. The covariance between the returns of the two assets is 0.015. Which of the following is closest to the correlation coefficient between the returns of the two assets if they are combined into a portfolio consisting of 70% asset 1 and 30% asset 2?

Group of answer choices

0.50

0.50 (i.e. negative 0.50)

0.00045

0.30