An affiliated enterprise refers to an economic organization composed of two or more corporate or institutional legal persons of the same or different ownerships, based on the principles of voluntariness, equality, and mutual benefit. Which of the following are affiliated companies:. ['After negotiation, a foreign-funded enterprise and a state-owned enterprise jointly invested to build ten hope primary schools in a mountainous area.', 'A well-known company cooperates with a discipline leader of a key university to set up a high-tech company focusing on research and development.', 'Company A is a high-tech enterprise jointly established by Company B and Company C. Recently, Company A and Company B invested together to form a foreign trade enterprise.', 'Zhang is the legal representative of a state-owned enterprise. Recently, he and a technology company jointly invested and established a trading company.']