Final answer:
The email contains both grammar errors and poor spelling, such as the misspelling of 'concern' and incorrect capitalization, which indicates option d. both a and c is correct.
Step-by-step explanation:
The Internet communication problem in the email above is both grammar errors and poor spelling. The correct answer to the question would be d. both a and c. This includes issues such as the misspelling of 'concern' as 'consern', incorrect capitalization with 'To Who' instead of 'To Whom', and the lack of proper punctuation in the address section. A professional email should always be proofread to ensure grammar, spelling, and proper formatting are in place.