In each question, select the correct option that combiner the two sentences without changing their meaning. She pedalled her cycle faster. It was getting dark.

• A.  It was getting dark because she pedalled her cycle faster.
• B.  Since she pedalled her cycle faster, it was getting dark.
• C.  It was getting dark so she pedalled her bicycle faster.  
• D.  It was getting dark for she pedalled faster.