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.
You must read the instructions. You won’t know how to use this machine without reading them
A. Reading the instructions, so you will know how to use this machine
B. Without reading the instructions, the use of this machine won’t be known
C. Unless you read the instructions, you won’t know how to use this machine
D. You will know how to use this machine unless you read the instructions