Answer: D. Bridging
Explanation:
BRIDGING SOCIAL CAPITAL is one part of Social Capital as opined by Robert Putnam with the other being BONDING.
Bridging Social Capital describes a connection between people that hail from different demographics in a society such as race, class, religion, etc. It in effect refers to connections that 'bridge' communities together.
The Occupy Wall Street movement brought people together regardless of their social designation hence it being BRIDGING.