Which of the following is NOT described in the passage

A．Whales migrate to breed and give birth to their young.

B．Whale-watching in Boston in summer is attracting.

C．Seals breed in the north before migration.

D．Reindeer feed on grass.

建设工程中，以一定的方式中断风险源，使其不发生或不再发展，从而避免可能存在的潜在损失，这是一种（）的风险对策。

A、保险转移

B、风险回避

C、损失控制

D、风险自留