What are all the possible causes for an end user not being able to enter data on a data form?

A planner is supposed to be able to submit data within a data form.
What are all the possible causes for an end user not being able to enter data on a data form?
Select all that apply.

A.
The planning unit is set to first pass.

B.
Another user owns the planning unit.

C.
The user has read access to the members on the data form.

D.
The form contains summary-level members in a bottom up version.

E.
The form is set to Read Only.

Explanation:
C, E: By assigning access to a data form, you control which users can change its
design (for example,
its layout and instructions) and input data. Users can select only members to which they have
read or write access. Users can edit data forms only if they have access to at least one member
of each secured dimension. For example, if users have read-only access to the Europe entity, the
rows and columns on data forms that include the Europe entity are displayed as read-only. Users
can change data only for members to which they have write access.
D: For bottom-up versions, rows and columns with level 0 members allow data entry. Rows or
columns set to a parent member are read-only. The point of view must also be set to the level 0
member to allow data entry on a bottom-up version. Target versions allow data entry in parent
and children members.

If you assign children to bottom-up versions, these versions display as read-only parents on data
forms.