Mary, your friend from college, has started a home business selling her hand-knitted scarves and sweaters online. She has a professionally designed web page, but is concerned about the possibility of fraud in online purchases. She asks you for some procedures to reduce the risk of fraud in her online transactions. Which of the following would you advise her to do?(Points : 2)

Use customer validation controls

Store all customer information on a web server

Discourage customers from using credit cards for purchases

Use a firewall to make her website impenetrable