Before giving a presentation, you should a. practice repeatedly. b. arrive early to prepare the room and test any equipment. c. practice stress-reduction techniques. d. all answer choices are steps that a speaker should complete prior to giving a presentation.

answer; i believe two are ; /// world bank and international monetary fund; good luck

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.