A woman has a son with her first partner, and that son has a son of his own-the grandchild of the original woman. The original woman also has a son with a second partner, who also grows up to have another son; a second grandchild. What is the relatedness between the grandchildren,
A. 0.0625
B. 0.25
C. 0.125
D. 0.875
E. 2
Answer: A. 0.0625
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