The cash discount term $"\frac{2}{10},$ net ${30}^{\text{'}\text{'}}$ means that:

the invoice is dated February $10$ and must be paid by February $30.$

the buyer will, in effect, be borrowing at a $36$ percent annuat interest rate if he takes $30$ days to pay the invoice.

the buyer must make a $2$ percent down payment$--$with the balance due in $10$ to $30$ days.

a $2$ percent discount off the face value of the invoice is permitted if the bill is paid within $10$ days.

Both B and D are true.