<span>Assuming that this is referring to the same list of options that was posted before with this question, the best thing to look for in the proofreading process would be "errors in sentence structure"</span>
Answer:
<u><em>Correction:</em></u>
There is some problem though he seems very happy and confident.
(Use of present indefinite instead of present continuous)
Possessive common nouns are common nouns or pronouns that own other nouns. Apostrophes are used to indicate this possession. Example: I will not hide the teacher's glasses.
