Regarding Streaming’s topology, what is wrong in the following description?

Regarding Streaming’s topology, what is wrong in the following description?
A . A Topology is a directed acyclic graph (DAG) connected by a set of Spout components and Bolt components through Stream Groupings
B . Topology will keep running until it is explicitly killed
C . Business logic is encapsulated in Topology
D . A Topology can only specify to start one Worker process

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Answer: D