Artists could make their pictures better if they__this__only those parts of the moon which are lighted up by the sun are bright.A;had in heart B;kept in mind我感觉好像两个都可以呢

Artists could make their pictures better if they__this__only those parts of the moon which are lighted up by the sun are bright.
A;had in heart B;kept in mind我感觉好像两个都可以呢