Which settings can you change and still run a successful consistency check?

You have set up a planning area, and data is now available. You adjust the necessary time profile settings and run a consistency check.

Which settings can you change and still run a successful consistency check? Note: There are 2 correct answers to this question.
A . Add a new time profile level to the time profile.
B. Change the numbering hierarchy of the period IDs in the time profile.
C. Change the description of the attributes in the time profile.
D. Change the past and future horizon of the levels in the time profile.

Answer: C,D