Scott Works for an Online Retailer and Has to Format

Multiple Choice

Scott works for an online retailer and has to format the border around each element on their web page. He has to set the border design and the border color for each element. He needs to understand how the appearance and color of the border can be defined. Scott wants to use the color gray for the top and left borders and black for the right and bottom borders for an element. Which of the following should he use to define this?

A) border-color: gray black gray black ;
B) border-color: gray, black, gray, black ;
C) border-color: gray black black gray ;
D) border-color: gray, black, black, gray ;