The correct answer is (a) Argentina.
Argentina won the gold medal in football at the 2008 Summer Olympics in Beijing, China. They defeated Nigeria 1-0 in the final.
Argentina qualified for the Olympics by finishing first in their group in the 2007 South American Youth Championship. They then defeated Mexico, the United States, and the Netherlands to reach the final.
In the final, Argentina faced Nigeria. The game was tied 0-0 at the end of regulation time, and then extra time. In the penalty shootout, Argentina won 4-2.
This was Argentina’s first gold medal in football at the Olympics. They had previously won the silver medal in 1928 and 1996.
(b) Belgium finished fourth in the tournament. They lost to Brazil in the bronze medal match.
(c) Brazil finished third in the tournament. They lost to Argentina in the gold medal match.
(d) Nigeria finished second in the tournament. They lost to Argentina in the gold medal match.