Which amendment was made possible by the advances in technology, allowing faster travel and communication? a. the 14th amendment, ensuring that people are treated equally under the justice system b. the 20th amendment, setting january 20 as inauguration day for the president c. the 21st amendment, allowing the sale, production, and transportation of liquor that was prohibited by the 18th amendment d. the 26th amendment, lowering the voting age from 21 to 18