Write the right answer to the question based on the context passage.
Q: Kadin loved the desert. Many creatures lived in the desert. Some learned to survive within her harsh burning grip. Some even learned to thrive in her, building stone monuments to themselves and living their lives surrounded in the lavish luxuries of Gods. How puny their monuments were compared to the desert herself.
Where they had castles surrounded by dry moats, the desert had mountains surrounded by thousand year sandstorms. Where they had silks and the most beautiful slaves serving their every greatest desire, she had dunes that stretched for a thousand leagues and a sun that burned huge and deep crimson in the violet sky. Where desert kings, the Danken, dined on the finest food and drank the finest wine, the desert drank every drop of water from the air itself and feasted on men.
Kadin knew the desert. He knew her voice whispering in the dark of night like a dangerous lover. The sound he heard now was not her voice but a cry from one trapped within the desert's teeth. It was the cry of a woman.
Kadin rose from his makeshift bed in the dip of two dunes. He stood quickly, tying the leather straps of his knife belt around his waist. He pulled on his boots and silently mounted White Ash. THe mare felt his soft touch and made no sound.
Kadin listened and heard the cry again. He studied the dunes in the darkness of night. THe blood moon painted the desert a deep red. He felt the echos and turned White Ash towards their origin. He rode quietly into the night.
Kadin saw the glow of torchlight long before cresting the hill. He guessed four riders from the sound of their horses and confirmed it when he rose above them.
Three men, now on foot, chased a woman in black across the dune. Their horses stood back, panting from a hard ride. The woman's own stallion lay dead, a black arrow buried in its flank. Question: Whose horse was killed?
A: 
Kadin's horse