To build a modern logistics system，we should work on the（ ）of its infrastructure，including railways and ports，and promote the integration of resources in the sector.
digital transformation
new generation of communication technology
block-chain technology
VR and AR
为了建立一个现代物流系统，我们应该致力于包括铁路和港口在内的（数字化转型）基础设施的建设，并促进该行业的资源一体化。
A.数字化转型
B.新一代通信技术
C.区块链技术
D.虚拟现实和AR