Giorgio wrote:Created in 1731, Anders Celsius' original thermometer had a scale where the value of 0 corresponded to the boiling point of water; after he died in 1744 the scale was reversed to its present form.

(A)in 1731, Anders Celsius' original thermometer had a scale where the value of 0 corresponded to the boiling point of water; after he died in 1744 the scale was reversed to its present form.--There is a problem with he , since Anders Celsius'
is in possessive form we have to use his rather than he .

(B)in 1731, Anders Celsius' original thermometer had a scale in which the value of 0 corresponded to the boiling point of water; after his death in 1744 the scale was reversed to its present form.--Correct

(C)in 1731, Anders Celsius' original thermometer had a scale in which the value of 0 corresponded to the boiling point of water; after he died in 1744 the scale was reversed to its present form.--same as A

(D)by Anders Celsius in 1731, his original thermometer had a scale in which the value of 0 corresponded to the boiling point of water; reversing the scale to its present form after his death in 1744.---connects a clause having a subject (his original thermometer) and a verb(had) with a comma . Also reversing the scalecannot be added after a semi colon as it cannot stand by itself .

(E)by Anders Celsius in 1731, his original thermometer had a scale where the value of 0 corresponded to the boiling point of water; after his death in 1744 the scale reversed to its present form---same issue as D .