问题
. A look at recent trends in world fisheries reveals ________ the ocean on a global scale.
A:how we have swiftly affected
B:that how swiftly we have affected
C:how swiftly we have affected
D:however swiftly we have affected
B:that how swiftly we have affected
C:how swiftly we have affected
D:however swiftly we have affected
正确答案是：
