Answer:
A) 1.0%
Explanation:
Given that
Security Yield       (%)
Treasury            4.6
AAA corporate      4.8
BBB corporate      5.6
B Corporate        6.2
By considering the above information, the credit spread of the BBB corporate bond would be
= BBB corporate - Treasury
= 5.6% - 4.6%
= 1.0%
We simply deduct the treasury from the BBB corporate so that the credit spread could come