That would be A, an adjective phrase. :)
Answer: The answer is D and B
Explanation: Citizen Journalism is based upon public citizens "playing an active or important role in the process of collecting, reporting, analyzing, and circulating news and informations.
technology means all techniques, skills, methods or procedures related to the production of products and services. or to be used to achieve one of the objectives and home economics is a subject concerning human development, personal and family finance, housing and interior design, food science and preparation, nutrition and wellness, textiles and apparel, and consumer issues.