In Which of the Following Ways Did President Obama Expand

In which of the following ways did President Obama expand restrictions on lobbying?

A) preventing all former executive agency employees from lobbying
B) reducing executive agency hiring of individuals who had recently lobbied
C) prosecuting former executive agency officials who lobby after leaving the administration
D) placing caps on the number of lobbyists that can be registered in Washington
E) eliminating the ability of lobbyists to approach members of Congress on capitol grounds