Which One of the Following Formulas Illustrates the Mechanics of Covered

Which one of the following formulas illustrates the mechanics of covered interest arbitrage? Assume the $1 is borrowed and S₀ = spot rate; F₁ = one-year forward rate; R_F = foreign country risk-free rate; and R_US = U.S.risk-free rate.

A) $1 * F₁ * (1 + R_F) /S₀- $1 * (1 + R_US)
B) $1 * S₀ * (1 + R_F) /F₁- $1 * (1 + R_US)
C) $1* F₁* (1 + R_F) /S₀ + $1 * (1 + R_US)
D) $1* S₀ * (1 + R_F) - $1 * (1 + R_US) /F₁
E) $1 * S₀ * (1 + R_F) /F₁ + $1 * (1 + R_US)