Mona is self$-$employed working as a fortune teller. Her net income from this activity was $$250$ in $2023.$ Which of the following is true regarding her self$-$employment $($SE$)$ tax for the year?

A$.$ She has SE tax because she was self$-$employed

B$.$ She has SE tax because net income was earned

C$.$ She has no SE tax since net income was less than $$400$

D$.$ She has no SE tax because net income was less than $$1,000$