A student makes two reaction tubes during biology lab. In one, he adds guaiacal and buffer. In another, he adds pure peroxidase and buffer. The of the buffer is 5; peroxidase's optimal pH is around 6. What will happen to the tube?
A. It will turn a light amber, but slowly.
B. It will turn a deep amber but quickly.
C. It will turn a light amber and then a dark amber
D. It will remain clear
E. It will turn amber, but fade to clear quickly