Assume That Capital Is Not Perfectly Mobile or Substitutable Between $\Delta\varepsilon$

Assume that capital is not perfectly mobile or substitutable between country A and country B.In this case the relationship between the interest rates in country A and country B can be expressed as:

A) r_A = r_B - $\Delta\varepsilon$ .
B) r_B = r_B - $\Delta\varepsilon$ + x.
C) r_A = r_A - $\Delta\varepsilon$ - x.
D) r_A = r_B - $\Delta\varepsilon$ + x.