Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

She phoned him early in the morning. She wanted to make sure she caught him before he left for work.

A. She phoned him early in the morning so as to want to catch him before he left home. 

B. She phoned him early in the morning lest she should catch him before he left for work. 

C. She phoned him early in the morning because she wanted to make sure she caught him before he left for work. 

D. She phoned him early in the morning so that she wanted to make sure she caught him before he left to work.