An investment of $1 each in two different securities led to a value of $11 (Security A) and $16 (Security B), respectively, after 15 years. When comparing the rate of return earned by the two securities, it can be said that


a.)Security B earned a higher average annual rate of return.

b.)Security A earned a higher average annual rate of return.

c.both securities earned the same average annual rate of return.

d.)it is impossible to calculate the securities rates of return based on this information.