The 2-input XOR gate has a high output only when the input bits are _____ A. even B. different C. low D. high E. None of the above

The correct answer is: B. different.

A 2-input XOR gate has a high output only when the input bits are different. For example, if the input bits are 0 and 1, the output will be 1. If the input bits are both 0 or both 1, the output will be 0.

Option A is incorrect because the output of an XOR gate is high only when the input bits are different, not when they are even.

Option C is incorrect because the output of an XOR gate is high only when the input bits are different, not when they are low.

Option D is incorrect because the output of an XOR gate is high only when the input bits are different, not when they are high.

Option E is incorrect because the output of an XOR gate is high only when the input bits are different.