Which of the following processes is catalyzed by arginase?

A) the conversion of D-arginine to urea and D-ornithine
B) the hydrolysis of L-arginine to urea and L-ornithine
C) the hydrolysis of L-arginine to urea and D-arginine
D) the conversion of both the D and L forms of arginine to urea and the D and L forms of ornithine