Which is the most likely reason for its location in the periodic table

Helium (He) has a atomic number 2 but resides at the top of group 8A.

Choices:
A. Helium is a transition metal
B. Helium loses its electrons easily
C. Helium is a gas at room temperature
D. Helium has a complete outer energy shell

D. Helium has a complete outer energy shell

Helium has 2 electrons that fill the 1s shell.