Nought's had , all spent / where our desire is got without content :/ tis safer to be that which we destroy / than by destruction dwell in doubtful joy " who is the speaker ?

Nought's had , all spent / where our desire is got without content :/ tis safer to be that which we destroy / than by destruction dwell in doubtful joy " who is the speaker and what is the significance ? A:  lady macbeth regretting her actions : B : macbeth  regretting his actions : C: lady macbeth comforting her husband : D : the witches speaking to macbeth ? which option is true