Find the Mean of the Poisson Random Variable $\lambda = 1.33$

Multiple Choice

Find the mean of the Poisson random variable.
-The number of calls received by a car towing service in an hour has a Poisson distribution with parameter $\lambda = 1.33$ . Let $X$ denote the number of calls received by the service in a randomly selected hour. Find the mean of X.

A) $0.665$
B) $1.33$
C) $1.77$
D) $1.153$