The author doesn’t emphasize the difficulties involved in making the paintings. The inaccessibility is used to question whether aesthetic enjoyment is the only purpose served by the paintings. Because the paintings were hard to access, it would be difficult for people to look at the paintings and gain aesthetic enjoyment from them.

This is the best answer. As explained below the question stem, the author mentions the inaccessibility to show that the hypothesis in P1 doesn’t fully explain the paintings, which sets the stage for the different hypothesis in P3.

The author doesn’t suggest that “only” certain people could view the paintings. There’s no evidence of restriction on viewing based on one’s identity in the community.

There’s no evidence this is the purpose. The inaccessibility is used to question whether aesthetic enjoyment is the only purpose served by the paintings. Because the paintings were hard to access, it would be difficult for people to look at the paintings and gain aesthetic enjoyment from them.

There’s no evidence the reference to inaccessibility supports anything in the hypothesis in P1. The inaccessibility is used to question whether aesthetic enjoyment is the only purpose served by the paintings. Because the paintings were hard to access, it would be difficult for people to look at the paintings and gain aesthetic enjoyment from them.