Which of the following is true to implement the Stock Exchanges and Brokers classes in the preceding UML class diagram in a database?

Multiple Choice

• The primary key of Brokers is a foreign key in Stock Exchanges.

• The primary key of Stock Exchanges is a foreign key in Brokers.

• The association between Brokers and Stock Exchanges is implemented as a linking table.

• Both "The primary key of Brokers is a foreign key in Stock Exchanges" and "The primary key of Stock Exchanges is a foreign key in Brokers" are true.

• None of these is true.

Stock Exchanges Brokers 6 1.1 21.. 5 0.. 1..1 0.. Stocks Buy/Sell Transactions 3