The High Court . . . . . . . the death sentence of the prisoner.

set down
set upon
set about
set aside

The correct answer is D. set aside.

To set aside something means to cancel or annul it. In this case, the High Court canceled the death sentence of the prisoner.

The other options are incorrect because they do not mean to cancel or annul something.

  • To set down something means to write it down or record it.
  • To set upon something means to attack it.
  • To set about something means to start doing it.