The main reason for the thermal runaway of the battery and the increase of the internal pressure, which leads to the deformation and expansion of the appearance is ().

The main reason for the thermal runaway of the battery and the increase of the internal pressure, which leads to the deformation and expansion of the appearance is ().
A . Electrolyte leakage
B . More electrolyte
C . Gas leakage
D . Plate gasification

Answer: C