how to test option item in select attribute using protractor?

I am trying to test items text in select options but my test gets failed and give me error here is my spec:

it('should test the sorting_options text', function() {

  expect(element.all((by.id('sorting_options')).Last().text).toBe('Score');
});

here is Error i received :

C: \wamp\ www\ First - angular - App > protractor conf.js

Starting selenium standalone server...
[launcher] Running 1 instances of WebDriver
Selenium standalone server started at http: //192.168.100.9:31794/wd/hub
[launcher] Error: C: \wamp\ www\ First - angular - App\ protractorSpec\        spec.js: 38

how can in resolve this issue?