Insight refers to

A. prior learning facilitating problem solving
B. prior learning hindering problem solving
C. the tendency to respond in a certain manner, based on past experience
D. the sudden realization of a problem's solution

a photo collage of women at work during world war 2

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.

answer; graduated cylinder;

answer; the difference intentions of each photographer;