A preliminary guide for comparing the simplicity of logic circuits is to count the number of input _____ leads. A. wire B. bus C. gate D. All of the above E. None of the above

The correct answer is: C. gate

A gate is a basic building block of digital circuits. It is a device that takes one or more input signals and produces an output signal based on a Boolean function. The number of input leads of a gate is a measure of its complexity. The more input leads a gate has, the more complex it is.

A wire is a conductor that connects two or more components in a circuit. A bus is a group of wires that are used to carry multiple signals. The number of input leads of a wire or bus is not a measure of its complexity.

Therefore, the correct answer is C. gate.