The ________ of a photo refers to the difference between the darkest and the lightest areas of the image

Two methods that are expected to be in all Java classes are:

(a) getName and setName (b) toString and equals (c) compareTo and charAt (d) toLowerCase and toUpperCase

Often, large manufacturers manage their purchasing functions using a(n):

a. omnichannel portal. b. customer portal. c. industry consortia–sponsored marketplace. d. private company marketplace.