This President's death, while in office, allowed the Compromise of 1850 to be approved.

a.

Harrison

c.

Taylor

b.

Polk

d.

Fillmore

I think the correct answer from the choices listed above is option C. It is Taylor's death, while in office, that allowed the Compromise of 1850 to be approved. Zachary Taylor was the 12th President of the United States, serving from March 1849 until his death in July 1850.