What happened to Eliza P. Donner’s cousin Mary that Mr. Oakley had to carry her?

A She had breathing problems and was unable to hike in the snow without losing breath and passing out.

B Mary had been paralyzed from the waist down before the Donner Party originally started west.

C She broke her ankle when her leg was caught in a trap that had been set for wild animals.

D It was so cold one night that she couldn’t feel that her leg had rolled into the fire and burned until it was maimed.