Laura is training to run a race. She keeps track of the number of miles she runs. She has been training for 8 weeks, and she has run a total of 96 miles. At what rate has she been running, in miles per week? Choices
A. 12 miles per week
B. 11 miles per week
C. 9 miles per week
D. 14 miles per week

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?