‘Don’t look a gift horse in the mouth’ means ___________?

A. find flaws with something that you have been given
B. don’t be unthankful when you receive a gift
C. don’t settle with minuscule gifts rather look for more
D. choose a sensible moment to change your mind

Don’t look a gift horse in the mouth

‘don’t look a gift horse in the mouth’ means don’t be ungrateful when you receive a gift. The proverb “don’t look a gift horse in the mouth” refers not to finding flaws with something that you have discovered or been given free of cost.