Kevin, a manager at FitPlus fitness club, owns a website that updates information regarding his fitness club. He created background gradients by tiling gradient images across a page or element. Now, he wishes to modify these and add gradients supported by Cascading Style Sheet (CSS). Kevin would like to apply a gradient that transitions from blue for the top portion of the page to white for the bottom portion of the page. Which function should be use? a) background: linear-gradient(blue, white) b) background:linear-gradient(bottom white, top blue): c) background:linear-gradient(white, blue): d) background:linear-gradientito top blue, to bottom white):