Which of the following is an example of a defining relative clause?

Which of the following is an example of a defining relative clause?

a. The car that I bought last week broke down.

b.  My brother, who lives in New York, got married last weekend.

c.  This car, which is a BMW, was made in Germany.

d.  Jennifer, whose husband you met yesterday, is going for an operation next week.

 

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