Question

what characteristic of a purely competitive market does crude oil have?
the product has no substitutes that are close to it in price.
the product has an unlimited number of sellers.
the product is always packaged in the same way.
the product is the same no matter who produces it.

Explanation:

In a purely competitive market, products are homogeneous. This means that the product is the same no matter who produces it. There is no differentiation in terms of quality, features, etc. among the products sold by different firms in the market. Firms are price - takers and the focus is on the uniformity of the product.

Answer:

The product is the same no matter who produces it.