Security:	Treasury	AAA Corporate	BBB Corporate	B Corporate
Yield (%):	5.2	5.4	6.8	8.3

The above table shows the yields to maturity on a number of

four

-year,

zero-coupon securities. What is the credit spread on a

four

-year,

zero-coupon corporate bond with a B rating?

A.

2.5

%

B.

3.7

%

C.

3.1

%

D.

4.3

%