Which airlines operate the ERJ 175 with a Cabin Observer Jumpseat?

The correct choice identifies the airlines that utilize the ERJ 175 model equipped with a Cabin Observer Jumpseat. The ERJ 175 is tailored for regional travel and is commonly operated by several airlines that emphasize regional service.

United Airlines operates the ERJ 175 and incorporates a Cabin Observer Jumpseat in its regional configurations. Delta Air Lines is also known for its operations of the ERJ 175, and they similarly utilize the jumpseat for crew purposes. Additionally, Alaska Airlines includes the ERJ 175 in its fleet and implements the Cabin Observer Jumpseat concept in a similar manner.

This selection highlights airlines that have integrated the ERJ 175 into their fleets with the specific feature of a Cabin Observer Jumpseat, which is an important consideration for operational dynamics and crew management during flights. The other selections do not accurately reflect the airlines known for operating the ERJ 175 with this specific cabin feature.