Take context from the input text and decide on the accurate relationship between 'United Internet' and 'Internet service provider' from the options provided.
Options: product/material produced, director/manager, industry, brand

The top riser on the FTSEurofirst 300 was United Internet AG , which climbed 7.2 percent after the German Internet service provider said it may float its business offering web-hosting and other online services to corporate customers.
industry