King Mob, The Hero of New Orleans, and Old Hickory were all of Andrew Jackson's nicknames.
I believe D is the answer.
Because Pharaoh doesn't directly punish the midwives nor does he change his mind and continues in killing all the Hebrew baby boys (first born)
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C. A Union General.
He was a general and commander of the Union armies during the late years of the Civil War.
Because they were just now looking in the anatomy of the human body and the first vaccines were made