Beads were used as currency for centuries. But why beads? The striking fact about many objects that have been used as currency-gold, silver, and feathers, to name a few-is that they were first used mainly, and often solely, as decorative objects. Thus, it is natural that beads, which were initially valued as objects of adornment, also came to be used as currency. Which one of the following principles, if valid, would most help to justify the argument above? ['The similarity between the primary uses of two different objects can cause the secondary use of one to be transferred to the other.', 'An object cannot take on a derivative use unless it ceases to have its original use.', 'An object having a certain original use is likely to have the same derivative use as do other objects having that original use.', 'The similarity between the secondary uses of two different objects can cause the primary use of one to be transferred to the other.']