In a problem-and-solution essay, one way to strengthen your position is to

The correct answer would be to respond to possible opposing views. In addition to this, in a problem-and-solution essay, one way to strengthen your position is to add information from trusted resources. If you are going to provide a solution to a problem without sharing your own opinion, you should  search for viewpoints of experts in this area or field as well, in an attempt to be reliable and accurate.

"throngs rushed to the coastal area near the airport from which the plane had taken off, overloaded with relief supplies clemente wanted to make sure reached the victims of an earthquake in nicaragua."