Answer:
D. It is a fragment and needs a subject.
Explanation:
"Flew through the meadow" describes something that an object does. It doesn't specify a subject and it doesn't make much sense without one. A good example of a subject for this sentence fragment would be "The bird" or "The butterfly", which would make the sentence "The bird/butterfly flew through the meadow." That would be a complete, logical sentence, since an object to perform the given action is present.
Answer:
To manage time wisely, this way they are confident while they teach which helps the child as well as the teacher.
Answer:
d.
Slightly more correct than a. and the other 2 make no sense