Whatever grants the children greater protection from the threat is the superior method.
I see no reason to agree to this premise.
Consider the following:
Whatever grants Americans greater protection from the North Korean nuclear threat is the superior method.
Exterminating all North Koreans grants the greatest protection against North Korean nuclear threat.
Therefore, exterminating all North Koreans is the superior method of protecting Americans.
You may well deny the minor premise, but even if it were true, I assume that you wouldn't grant the argument. The major premise is simply false.