The correct options are
B The Union Solidarity and Development Party won the elections.
C Thein Sein became the President of the country.
A party called “Union Solidarity and Development Party” won the elections under the leadership of Thein Sein. The party was backed by the military junta and won the elections with their complete support. In the following year, the military junta was dissolved and a civilian government was set up with Thein Sein as the President of the country. In 2015, Thein Sein made efforts to conduct the first ever parliamentary election in Myanmar. The NLD won the elections and established the government under the leadership of Aung San Suu Kyi.