Henry would like to simplify this so that it has no ( x ) and no parentheses. Assuming Henry is correct, which one of the following expressions could he have obtained?
a) ( 2(x² + 1) )
b) ( {x² - 1}/{x - 1} )
c) ( {x² - 1}/{x + 1} )
d) ( {x² + 1}/{x - 1} )