But, behind the scenes, a series of technological innovations known broadly as containerization and intermodal transportation had led to swift productivity improvements in cargo-handling. What is the basic structure of this sentence?
A.
A series of technological innovations and intermodal transportation had led to swift productivity improvements in cargo-handling.
B.
Intermodal transportation had led to swift productivity improvements.
C.
A series of technological innovations had led to swift productivity improvements.
D.
Containerization and intermodal transportation had led to swift productivity improvements in cargo-handling.