Which is the missing piece?
Great, you answered "D".
See here what other people have answered:
- A
- B
- C
- D
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Interesting fact:
No one knows where the abstract heart-shaped symbol for the human organ originated. The human heart will keep beating outside of your body because it has its own electrical impulse. The symptoms of a heart attack are different in men and women. While men mostly experience pain or discomfort in the chest area, woman may feel nausea, jaw pain and cold sweat.