To Guard Against the Contingency of a Business's Sole Vendor

Multiple Choice

To guard against the contingency of a business's sole vendor suffering a catastrophe, it is wise for a startup to use one supplier for about _____ to _____ percent of its needs and one or more additional suppliers for the rest and also as backups in case the principal supplier fails.

A) 40;  50
B) 50; 60
C) 60; 70
D) 70; 80
E) 25; 35