Maria is using a meter stick to determine the height of a foot. If the smaller unit on the meter stick is centimeters, which measurement could Maria have used to most accurately recorded the height of the door? A) 2.31 meters
B) 2 meters
C)2.309 meters
D)2.3 meters

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?