Which of the Following Sentences Contains a Restrictive Clause

Which of the following sentences contains a restrictive clause?

A) My friends always eat pizza on Fridays.
B) The Japanese who eat lots of fish have fewer heart attacks.
C) Mars, the fourth planet from the sun, is like the Earth in many ways.
D) If the weather is pleasant, we will go jogging this evening.
E) Tides, which have many causes, are a powerful force of nature.