Trade between most nations is presently characterized by a certain degree of isolationism

One of the main disadvantages of partial-run type editions is:

A) expensive CPM levels compared to full-run advertising in the same publication. B) support it provides dealers or special offers from one locale to another. C) allowing national advertisers to develop better relationships with retailers by listing regional outlets. D) ability to test specific ad elements in a realistic environment before going national. E) its inability to help improve the copy of the ad.

For some projects, technical expertise and cognitive ability may be critical ________ factors that are required

Fill in the blank(s) with correct word