Which of the following is compound sentence?     

Change the following sentences as directed:

a) In spite of having vast riches, the man wants more. (make it complex) 

b) Dhaka is one of the biggest cities in Bangladesh. (make it comparative) 

c) Did you send the book? (make it passive) 

d) It is said that morning shows the day.(active) 

e) Every mother loves her child. (negative) 

Choose the best alternative that expresses the meaning of the original sentence:

By the time we arrived in Italy, we have traveled through four countries.

Transforme the following sentence into compound sentence. "He was ill,therefore he would not come.

Though he was very rich, he was still very unhappy' is a -