Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. Right-handed artists could more easily have avoided casting shadows on their work, because engravings in prehistoric caves were lit from the left. B. The tips of engraving tools and brushes indicate that these instruments were used by right-handed artists whose work was lit from the left. C. The best lighting for most engravings suggests that they were made by right-handed people trying to avoid the shadow of their hands interfering with their work. D. Right-handed artists try to avoid having the brush they are using interfere with the light source.