Mavis Company's net income was $$45,000$ in $2020.$ Mavis reported an increase in accounts payable of $$6,000,$ an increase in inventory of $$2,000,$ depreciation expense of $$3,000,$ and payment for purchase of equipment of $$8,000.$ What was Mavis's net cash provided by operating activities?

a$.$ $$52,000.$

b$.$ $$48,000.$

c$.$ $$39,000.$

d$.$ $$40,000.$