The given question is about interpreting the behavior of a stock market index and the MNCs over 15 days from a graph (which has not been provided). The correct answer is option 4.

Option 1 says that MNCs fell steeper in the given period, but we cannot confirm this without looking at the graph.

Option 2 mentions that every non-MNC company`s share prices rose by over 5% on the 12th day. With only the information given, we cannot confirm this because we don`t have specific data about each non-MNC company.

Option 3 suggests that the government announced a policy disfavoring MNCs on the 11th day. This is pure speculation since the question doesn`t provide any information related to government policies.

Option 4 states that whatever the reason for the market revival on the 12th day, it seems to only apply to non-MNC companies. This is the best conclusion based on the information given. We don`t know the specific reasons the market changed, but it seems from the general description that non-MNC companies were affected differently than MNCs. So, this statement is more plausible given the context.