What is the origin of the German and North American last name 'Borsch' or 'Börsch'?

A. Derived from the French word for 'battlefield'
B. Derived from the Old English word for 'shield'
C. Derived from the first name of Latin origin Liborius or from a diminutive of the Slavic personal name Borislav
D. Derived from the Germanic word for 'warrior'
Answer: 