Identify which of the following is a correctly formatted email address.

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Multiple Choice

Identify which of the following is a correctly formatted email address.

Explanation:
An email address must have a local part, an at symbol, and a domain that includes a dot with a valid top-level domain. This structure ensures the address can be correctly routed and delivered. johndoe@yahoo.com fits this pattern: the local part is johndoe, followed by @, then the domain yahoo.com, which contains a dot and a standard TLD. The other forms fail because they don’t use the proper symbols or include a complete domain and TLD: using words like at and dot isn’t a real email address; double dots in the local part and missing a top-level domain make the address invalid; ending the domain with a dot also lacks a proper TLD.

An email address must have a local part, an at symbol, and a domain that includes a dot with a valid top-level domain. This structure ensures the address can be correctly routed and delivered.

johndoe@yahoo.com fits this pattern: the local part is johndoe, followed by @, then the domain yahoo.com, which contains a dot and a standard TLD. The other forms fail because they don’t use the proper symbols or include a complete domain and TLD: using words like at and dot isn’t a real email address; double dots in the local part and missing a top-level domain make the address invalid; ending the domain with a dot also lacks a proper TLD.

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