which phase of the database design process would this information be developed?

Consider the following database information:

domain s_id: integer domain grd: fixed length
character string length 1

STUDENT_GRADE(
Student_Number: s_id NOT NULL
Grade: grd ) Primary Key
Student_Number

During which phase of the database design process would this information be developed?

A.
Logical

B.
Physical

C.
Conceptual

D.
Implementation