What is BT primarily known for in its business operations?

BT, originally known as British Telecommunications, is primarily recognized for its expertise in communications and technology services. Among its various offerings, the company has a strong reputation in designing and installing trader voice products, which are crucial systems in financial services, enabling real-time communication and trading, particularly in environments that require high-speed, reliable voice communication.

This area of specialization is important because trader voice systems facilitate critical transactions in trading floors, allowing traders to communicate quickly and securely. While BT does engage in other areas of business, such as cloud services, networking hardware, and cybersecurity, its distinctive role in the financial sector, particularly through its trader voice products, sets it apart as a leader in that niche. This focus allows BT to cater to the specific needs of financial institutions, making option B the most accurate representation of its core business operations.