Offering brainless pls

which situation could not represent a proportional relationship?
a) alex put 27 marbles in 3 bags and 54 marbles in 6 bags.
b) greg drove 130 miles in 2 hours and 325 miles in 5 hours.
c) eliza sold 8 candy bars for $16 and 15 candy bars for $30.
d) lewis packed 60 pears in 5 boxes and 112 pears in 9 boxes.

Given: ab ≅ cd and ad ≅ bc prove: abcd is a parallelogram. 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? triangle angle sum theorem sas congruency theorem sss congruency theorem cpctc