Which event occurred in 1907 related to coal trading in Cardiff?

• A. Opening of the Coal Exchange
• B. Construction of the Taff Railway
• C. The establishment of Cardiff University
• D. First million-pound coal deal

Answer: (D)

The main idea being tested is how the scale of Cardiff’s coal trade showed itself in a concrete, financial milestone during the early 20th century. In 1907, Cardiff saw its first million-pound coal deal, a moment that demonstrates the trade had grown to a level where the value of a single transaction could reach seven figures. This isn’t just about buying and selling coal; it shows how deeply the market was organized, with large volumes, high prices, and significant financial backing from banks and insurers, all coordinated through Cardiff’s trading networks and infrastructure.

Such a deal signals Cardiff as a major global coal port at the time and reflects the maturity of its trading system—how it connected producers, merchants, financiers, and shippers on a scale that could attract and handle very large sums of money. The other options point to important developments in the city, but they don’t capture this specific shift in the financial scale of coal trading: the Coal Exchange opening happened earlier, the railway construction relates to transport rather than a monetary milestone, and Cardiff University was established later.