positive + but + negative

1. ………………………………………………………………… . But holidays are also a time for wondering whether burglars have helped themselves to your valuables in your absence, and whether your neighbour has remembered to feed the cat. Companies such as, Homesitters and Housewatch aim to reduce the worry of leaving your home for any length of time.

a) However, some householders have other reasons for using the service.
b) So what is the attraction of doing the household chores for a stranger when you hate doing them in your own home?
c) People use holidays to rest and to get better, as a time to relax on a foreign beach or track up a mountain.
d) When they go on holiday, a lot of people have builders or decorators in and employ a homesitter to keep an eye on things.



i thought it must be c. Isn't correct?