dominique's total allowable medical expenses in 2019 were 4200$. her net income was 80,000$ and the cut-off for the medical expense amount in 2019 was 3% of net income ,or 2352, whichever is less. what was her federal medical expense tax credit in 2019? the lowest federal tax rate was 15%?

a-277

b-270

c-315

d-630