Which of the following italicized parts is an appositive clause（同位语从句)？A．I have no do

Which of the following italicized parts is an appositive clause(同位语从句)？

A．I have no doubt that he will overcome all these difficulties.

B．It"s a pity that you could not go shopping with us.

C．It seems that he would be late for the plane.

D．There are thousands of stars in the sky that are like the sun.

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