about cracked light bulb

Question

A cracked light bulb CANNOT glow because

A. the circuit is shorted
B. the leakage of argon gas
C. the tungsten wire rusts
D. the tungsten burns out in air

A and C are obviously wrong
Why the answer is D but NOT D ?

Why NOT B?

Answer 1

C is incorrect.
This is because only iron rusts (rusts = 生成鐵鏽).
If the statement is changed to 「The tungsten wire corrodes.」, it is also incorrect. This is because 「corrosion of tungsten」 usually refers to the slow chemical change of tungsten with substances in the environment, e.g. oxygen and water.

D is correct.
When electric current is passed through the tungsten wire, temperature increases. The tungsten reacts rapidly with oxygen in air and thus burns out.