Answer:
A. Omit the apostrophe in the father's.
Explanation:
You want a plural form here rather than a possessive form.
The answer is D <span>his skill as a marksman
</span>
I'm not too sure about this. However, I would say that it is Ok to say attached is the assignment. It seems wrong, but to make it seem more natural, maybe try adding extra words like requested.
Their performance varies considerable, they are often idle, and then might have an occasional flurry of activity. For example, if their attendance is sporadic, they may have good attendance for a while, and then disappear unpredictably from time to time.