How can you allow bidirational traffic?

How can you allow bidirational traffic? (something in those lines)

A.
static NAT

B.
dynamic NAT

C.
dynamic PAT

D.
multi-NAT

Explanation:
BD
Bidirectional initiation—Static NAT allows connections to be initiated bidirectionally, meaning both to the host
and from the host.
Source: http://www.cisco.com/c/en/us/td/docs/security/asa/asa83/configuration/guide/config/nat_overview.htmlNew 11q