Substitute Products and Services. The others are graded as WRONG.
I think it's all of the above, but that's a different argument. Here's from the book: For instance, the printed encyclopedia industry and the travel agency industry have been nearly decimated by the availability of substitutes over the Internet.
So I'll go with Substitute products or services
I think it's all of the above, but that's a different argument. Here's from the book: For instance, the printed encyclopedia industry and the travel agency industry have been nearly decimated by the availability of substitutes over the Internet.
So I'll go with Substitute products or services
