bank has $$200$ in assets and has a target

TA$/$NW ratio of $20.$ During a business cycle

boom its assets are revalued upwards by $$1.$ It

will thus $\_\_\_\_\_\_$ more to $\_\_\_\_\_\_\_$ assets

a$.$ borrow, buy $19$ new

b$.$ borrow, buy $20$ new

c$.$ sell, remove $19$ old

d$.$ sell, remove $20$ old