What would happen to the escape velocity if the mass of the Earth were doubled, keeping the radius the same?

1. It would remain the same
2. It would increase by a factor of √2
3. It would double
4. It would decrease by a factor of √2

if the mass of the Earth were doubled while keeping the radius the same, the escape velocity would increase by a factor of  √2 (approximately 1.414) compared to its original value.