With a flat battery, trying to start the engine by pushing the vehicle:

En español: Con la batería descargada, intentar arrancar el motor empujando el vehículo:

A Is the recommended way to start
B Can destroy the catalytic converter Correct answer
C Has no consequences
D Charges the battery immediately

Why this is the correct answer

It should not be done: unburned fuel can reach the catalytic converter and destroy it. It is better to jump-start with cables or proper assistance.

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