Final answer:
The correct envelope address according to the U.S. Postal Service preferred format is b. TOLLAND, CONNECTICUT 06084, using all capital letters without punctuation.
Step-by-step explanation:
The envelope address typed according to the U.S. Postal Service preferred format is TOLLAND, CONNECTICUT 06084. The U.S. Postal Service recommends using all capital letters, no punctuation, and the full state name when addressing envelopes. Abbreviations for states should not be used unless space is limited. You can see the preferred USPS format in the reference provided, which denotes "SACRAMENTO, CA 94259-0001" for the state and postal code part of the mailing address.