In addition to short circuits and sustained overloads, in what other situation are fuses likely to blow?

Correct Answer: Option D — loose fuse holder clips

Loose fuse holder clips create high-resistance connections, leading to localized heating (I²R losses). This heat transfers to the fuse element, causing it to melt or fatigue prematurely, even if the actual circuit current is well below the fuse's rated capacity, eventually resulting in nuisance blowing of the fuse.