Select the correct answer. Given: Prove: Two parallel lines passing the vertices with red line r at points (c, d) at (2, 10) and (0, b) at (0, 6) and blue line s intercepts (c, 0) at (2, 0) and (0, a) at (0, minus 4) Statements Reasons 1. Given 2. Application of the slope formula 3. Distance from to equals the distance from to definition of parallel lines 4. Application of the distance formula 5. Substitution property of equality 6. Inverse property of addition 7. Substitution property of equality Which step of the proof contains an error? A. Step 6 B. Step 4 C. Step 5 D. Step 2