Answer: d. all of the above
Step-by-step explanation:
Conglomerates are private companies that are engaged in various businesses. They also have branches around the world because they service various countries and markets.
Such companies are very powerful because of the influence they wield in the various countries that they operate in. Some well known conglomerates include: Am-azon, Fa-cebook, Dangote, Wal-mart and even Apple.