Which of the following statements is true?
a. it is usually less risky to use single suppliers rather than multiple suppliers.
b. when multiple suppliers are used, having geographically centralized suppliers could lessen the probability of all failing simultaneously.
c. when multiple suppliers are used, having geographically dispersed suppliers could lessen the probability of all failing simultaneously.
d. the risk mitigation effectiveness of using multiple suppliers has nothing to do with the probability of a super-event occurring.

What was the direct cause of the u.s. entry into world war ii? a. the bombing of pearl harbor b. the invasion of poland by germany c. the capture of belgium by germany d. the battle of britain

Popular culture mainly encompasses the realm of

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is: