Which career in the manufacturing cluster has employees that control cables, cages, and platforms used to move materials from place to place on a job site or in a factory?
a. potters
b. validation engineers
c. medical equipment repairers
d. hoist and winch operators

Which of the following was not an important contribution made by the lewis and clark expedition? a. they made detailed descriptions of the terrain of the louisiana territory. b. they fostered relationships with native american tribes. c. they advanced the u.s. fur trade with european buyers. d. they secured the u.s. border of the oregon territory by negotiating a treaty with england.