The narrative perspective in "hills like white elephants" can best be described as select all that apply.

missing a lot of contrast
third person limited
third person objective
missing a lot of detail

Explanation:

The third-person storyteller takes the fly-on-the-divider strategy to limits in "Hills Like White Elephants." We can see both the writer and the storyteller in Hemingway cooperating to build the story. It doesn't disclose to us what the characters are considering, just what they do, see, and in particular, what they state. Also, it just gives an absolute minimum of setting: the landscape, the climate (hot), and the train plans.  

The way that the story is told in the past tense methods the storyteller is assembling it sometime later, from memory, as it were, and rendering it in emblematic terms, utilizing likeness and similitude.