Final answer:
A home warranty would cover A/C and plumbing malfunctions, but not title defects, contractor liens, or structural problems.
Step-by-step explanation:
A home warranty typically covers various systems and appliances within a home. From the options provided, the items that would be covered by a home warranty are A/C and plumbing malfunctions. These are considered major systems in a home that ensure comfort and functionality. Title defects, contractor liens, and structural problems are not typically covered by a home warranty.