Answer:
A, but it depends on the k constant, distance in which you compress, and mass of the launching object
Explanation:
A stronger spring should have higher k constant which allows an object to launch with higher speed.
By using the conservation of energy if you were to launch an object which you initially press with the spring,

Solving for v (velocity):

We can see from this equation that when you increase k, v also increases.
If you decrease k, then v would also decrease
And of course, the distance in which you compress and the mass of the launching object also affects the speed.