The city recycling program is inconvenient. Instead of having to drop off recyclables at the city center, residents should have the option of another drop-off location, or collection should be made at the curb, alongside the trash cans. More residents will participate in recycling efforts if the materials are collected alongside trash pickups.

What type of problem-and-solution organization does this paragraph use
problem/solution/solution/recommendation
problem/solution
problem/cause/solution

Question

The city recycling program is inconvenient. Instead of having to drop off recyclables at the city center, residents should have the option of another drop-off location, or collection should be made at the curb, alongside the trash cans. More residents will participate in recycling efforts if the materials are collected alongside trash pickups.

What type of problem-and-solution organization does this paragraph use
 problem/solution/solution/recommendation 
 problem/solution 
 problem/cause/solution