"I have four dogs. All of them are white."
How should I translate "all of them"? Google Translate suggests simply tous.
(a) J'ai quatre chiens. Tous sont blancs.
Can I specify that it's all of them?
(b) J'ai quatre chiens. Tous d'entre eux sont blancs.
A sentence that means basically the same is the following: "I have four dogs, all of which are white." Can I translate like this?
(c) J'ai quatre chiens, dont tous sont blancs.