Consider the Following to Answer the Question(s) Below

Multiple Choice

Consider the following to answer the question(s) below:
A local cell phone provider wants to determine if the use of text messaging is independent of age. The following data has been collected from a random sample of customers.

-To conduct the independence test the correct degrees of freedom are

A) 2.
B) 3.
C) 6.
D) 5.
E) 4.