The correct answer is: C. Either I or II is implicit.
The statement does not provide enough information to determine whether assumption I or assumption II is definitely true. It is possible that the people in the area may welcome the decision to open more collection centers, as it may make it easier for them to pay their electricity bills. However, it is also possible that some people may not welcome the decision, for example if they believe that it will lead to increased traffic congestion in the area. Similarly, it is possible that opening more collection centers will reduce the amount of time required by customers to pay their electricity bills, but it is also possible that it will not have any impact on the amount of time required. Therefore, both assumptions I and II are possible, but neither can be definitely determined to be true based on the information provided in the statement.