Frances and Thomas are neighbours who share a single driveway that leads to a garage behind each of their homes. Frances owns the half of the driveway that is on her property, and Thomas owns the half of the driveway that is on his property. What is the name of the interest that Frances and Thomas have over each other's half of the driveway?

a.Easement by statute

b.Mutual easement

c.Non-mutual easement

d.Easement by prescription

e.Adverse easement