Which One of the Following Choices Provides the Best Example

Which one of the following choices provides the best example of capacity building?

A) A firm that has operated only domestically decides to expand into international markets.
B) Following a merger between two firms, executives work to ensure all knowledge is shared among key employees from both prior firms.
C) A firm decides to cross-train all its employees on all job functions.
D) A firm commits to building and maintaining a community pool and park for employees and members of the community.