Concept:NADECO was a pro-democracy group formed to challenge the annulment of the June 12, 1993 presidential election.
Explanation:The National Democratic Coalition (NADECO) was established in 1994.
Its main aim was to press for the re-validation of the June 12, 1993 presidential election.
It also demanded the reinstallation of all democratic structures that were dissolved after the election was annulled.
Therefore, the option that correctly matches the year and purpose is the one stating 1994 and the re-validation of the June 12 election.
Answer:C. in 1994, to press for the re-validation of the June 12, 1993 Presidential election.