Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to address envelopes with attn [title] Write " attn " followed by the name of the recipient. [step] The " attn " line should always appear at the very top of your delivery address, just before the name of the person you're sending it to. Use a colon after " attn " to make it clearly readable.

Ending1: [title] Include the author's name followed by their full middle initial (if any). [step] Unless it is his or her middle name, you may skip this step. Ending2: This line signifies to the mail carrier exactly for whom the letter is intended. [substeps] For example, write " attn: john smith, " where " john smith " is replaced with your recipient's name. Ending3: [substeps] Never put a period after the salutation. If the recipient reads your salutation, he or she will not know that you're mailing an envelope with attn. Ending4: [title] Write the recipient's last name. [step] The name of the recipient should always appear on the top left-hand side of the envelope, followed by their first and last name as well.

Answer format: ending1/ending2/ending3/ending4