The length of a certain wire is doubled and at the same time its radius is increased by a factor of 4. What is the change in the resistance of this wire?
A) It is reduced by a factor of 8.
B) It increases by a factor of 4.
C) It increases by a factor of 8.
D) It is reduced by a factor of 4.
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Based on our data, we think this problem is relevant for Professor Taylor's class at CORNELL.