How to refactor code to avoid multiple if-s?

On interview I was asked the following question:

I have following method:

public void foo(SomeObject o){
    if(o.matches(constant1)){
          doSomething1(); 
    }else if(o.matches(constant2)){
          doSomething2(); 
    }
    }else if(o.matches(constant3)){
          doSomething3(); 
    }
    ....
}

question was: you should refactor method above. What will you do?

On interview I didn't grasp how to make it.

Now I think that state design pattern is suitable for this task ?

Am I right? What do you think?

P.S.

I negotiated with my colleague. he thinks that strategy design pattern is more suitable.