In Comparing Exponential and Geometric Growth, Which Statement Is True $\lambda$

In comparing exponential and geometric growth, which statement is true?

A) Lambda ( $\lambda$ ) can be calculated from r and is equivalent to the natural logarithm of r.
B) Lambda $\lambda$ ) can be calculated from r and is equivalent to "e" raised to the r power.
C) The multiplier r can be calculated from $\lambda$ , and is equivalent to "e" raised to the $\lambda$ power.
D) The multiplier r is not used in estimating exponential or geometric growth.