The Recent Outbreak of Bovine Spongiform Encephalopathy (BSE)in Great Britain

Multiple Choice

The recent outbreak of bovine spongiform encephalopathy (BSE) in Great Britain and other countries probably resulted from 

A) spontaneous genetic mutations. 
B) housing cattle in too close proximity to infected sheep. 
C) the use of ground bone and meat in animal feed. 
D) the use of hormones to promote growth in cattle.