下列说法正确的是 [ ]

A．凡有能量变化的过程都是化学变化

B．吸热反应只能在加热条件下才能进行

C．放热反应可能需要加热才能进行

D．天然气在空气中燃烧时，其化学能将全部转化为热能

The required testing for a specific task has been completed and passed. The customer is not confident of the test and requests an additional modified test, this situation indicates inadequate ______ .

A．control procedures

B．audit review

C．assurance funding

D．quality plan development