For surely, sir, you will not assert, that a duty can be binding which is not founded on reason? if indeed this be their destination, arguments may be drawn from reason: and thus augustly supported, the more understanding women acquire, the more they will be attached to their duty—comprehending it—for unless they comprehend it, unless their morals be fixed on the same immutable principle as those of man, no authority can make them discharge it in a virtuous manner. they may be convenient slaves, but slavery will have its constant effect, degrading the master and the abject dependent.

how does this idea enhance wollstonecraft’s argument?

by suggesting that women’s assigned roles enslave them
by suggesting that women need more hired
by insisting that men explain women’s duties to them
by insisting that women have better morals than men