Answer: paying for health care can be very difficult for families.
Step-by-step explanation:
In stating that medical expenses were the leading cause of bankruptcy, the author is showing that paying these expenses takes such a toll on a person's resources that they can lose all they have and file for bankruptcy.
It is very difficult therefore, for some families to pay for health care because if doing so is so expensive that it causes bankruptcies, it only makes sense that these expenses are very taxing on families.