What Is the Formula of a Compound Based on Cubic

What is the formula of a compound based on cubic close packing where one quarter of the tetrahedral holes (T) are filled in a lattice made of lattice points of type A. What is the coordination number of the filled holes and the lattice points? Please select all that apply.

A) Formula A₂T
B) Coordination number of the lattice point would be 2 and the filled hole would be four.
C) Formula AT₂
D) Coordination number of the lattice point would be 4 and the filled hole would be four