$1\mathrm{.}1(5$ points$)$: Concerning the slope coefficient $b($in Fama's regression of the $\%$ change in the exchange rate on the forward premium$),$ which of the following statements is TRUE:

$($A$).$ For all values of b$,$ you should never borrow high$-$interest$-$rate currencies and lend low$-$interest$-$rate currencies.

$($B$).$ When $b=1,$ you should do nothing.

$($C$).$ When $b>0,$ you should borrow high$-$interest$-$rate currencies and lend low$-$interest$-$rate currencies.

$($D$).$ When $b1,$ you should borrow low$-$interest$-$rate currencies and lend high$-$interest$-$rate currencies.