x(t) or x(n) is defined to be an energy signal, if and only if

x(t) or x(n) is defined to be an energy signal, if and only if the total energy content of the signal is a ___________

A. Finite quantity

B. Infinite

C. Zero

D. None of the mentioned

This question was addressed to me in examination.

My enquiry is from Classification of Signals in division DSP – Basic Signaling of Digital Signal Processing

Right choice is A. Finite quantity

The best explanation: The energy signal should have a total energy value that lies between 0 and infinity.