AreaSimone, a single taxpayer, bought her home in Orlando $25$ years ago for $$55,000.$ She has lived continuously in the home since she purchased it$.$ In the current year, she sells her home for $$405,000.$ What is Simone's taxable gain on the sale?

a$.$ $$350,000$

b$.$ $$90,000$

c$.$ $$0$

d$.$ $$100,000$