The correct answer to the following question will be "The alienation clause".
Explanation:
The alienation clause seems to be a condition in such a legally binding contract that takes effect upon the ownership transfer of a designated estate or the sale of a counterpart estate.
Such is typical in mortgage agreements that provide full recovery if ownership of property investment transitions and are not covered by a lease contract.
De Beers enjoyed dominant position and control of the
diamond industry. As a result, it held control of market supply and demand
dynamics and drove the diamond prices. This was as a result of massive diamond
discovery in South Africa.