When deciding the composition of the engineering watch, which may include appropriately qualified ratings, following criteria shall be taken into account（） Ⅰ.the type of ship Ⅱ.the type and condition of the machinery Ⅲ.the safety of life, ship, cargo and port Ⅳ.the observance of international, national and local regulations
- AⅠ+Ⅱ
- BⅡ+Ⅲ
- CⅡ+Ⅲ+Ⅳ
- DⅠ+Ⅱ+Ⅲ+Ⅳ