A trust has $7,000 in interest income, $5,000 in tax exempt interest income, $4,000 in dividend income and $3,000 in capital gains. The trust's only expense was $2,000 in fiduciary fees. What is the allocation of fiduciary fees to principal and income?

a. $0 allocable to principal; $2,000 allocable to income

b. $400 allocable to principal; $1,600 allocable to income

c. $1,600 allocable to principal; $400 allocable to income

d. $2,000 allocable to principal; $0 allocable to income.