Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

Which of the following statements about commercial and government industry classification systems is most accurate?
Option A:Many commercial classification systems include private for-profit companies.
Option B:Both commercial and government classification systems exclude not-for-profit companies.
Option C:Commercial classification systems are generally updated more frequently than government classification systems.

Answer: C