The correct answer is D. all of the mentioned.
The dot-com bust in 2000 led to a decline in investment in many technology companies, including file-hosting companies. This made it difficult for these companies to raise the capital they needed to operate and grow.
The inability of file-hosting companies to successfully monetize online storage was another factor that led to their demise. Many of these companies offered free storage, which made it difficult for them to generate revenue.
The continued commoditization of large disk drives also made it difficult for file-hosting companies to compete. As the price of disk drives declined, it became easier for users to store their own files on their own computers.
As a result of these factors, many of the early SSPs and to many hosted file services went out of business.