Question

The World Trade Organization (WTO), North
American Free Trade Agreement (NAFTA), and
European Union (EU) all share the primary goal
of
(1) promoting space exploration and maintaining
satellites
(2) increasing economic aid to developing nations
(3) encouraging trade between countries and
lowering trade barriers
(4) developing regulations to preserve the
environment

Answer 1

Those organizations focus on trade for the mutual benefit of its members.

Specifically, they are formed  around a number of treaties that eliminate obstacles and barriers to the trade among their members.

The correct answer is: (3) encouraging trade between countries and
lowering trade barriers