A company sends an invoice to a customer for 1000, with a credit period of 30 days.which alternative is correct ?

1- current assets both increase and decrease by 1000, leaving no net change.

2- current assets increase by 1000, and equity increases by 1000.

3-current assets increase by 1000, and current liabilities increase by 1000

4- current assets increase by 1000 and equity is reduced by 1000