Final answer:
The comma between the city and state is not eliminated according to USPS envelope standards.
Step-by-step explanation:
When conforming to the United States Postal Service (USPS) standards for addresses on envelopes, certain punctuation is typically eliminated for standardization and efficiency. Specifically, out of the options provided, what is NOT eliminated from punctuation in the address to conform to USPS envelope standards is c. comma between city and state.
The hyphen in the ZIP+4 code is maintained to ensure the precise sorting of mail, and periods after abbreviations may be excluded. However, the comma between the city and state is retained to clearly separate these two elements of the address.