Which calling search space has the highest priority?

Refer to the exhibit.

Which calling search space has the highest priority?

A.
Phone Configuration > Calling Search Space: CSS_Internos.

B.
Phone Configuration > Calling Search Space: CSS_Locales.

C.
Directory Number Configuration > Calling Search Space: CSS_Locales.

D.
Directory Number Configuration > Calling Search Space: CSS_Internos.