The author's viewpoint in this excerpt is that he appreciates Diane France for helping scientists by making casts of the soldiers' bones.
In this excerpt, the author praise Diane’s casts because it saves the scientist more time and cost which will have be expended on investigating the answers for years to come.
Hence, the author's viewpoint in this excerpt is that he appreciates Diane France for helping scientists by making casts of the soldiers' bones.
Therefore, the Option B is correct.
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