Answer
1. RESTRICTIVE; no commas needed.
2. RESTRICTIVE; no commas needed.
3. NONRESTRICTIVE; commas are needed.
4. NONRESTRICTIVE; commas are needed.
5. RESTRICTIVE; no commas needed.
Answer:
they considered the case close
Explanation:
because they didnt have enough proof
Because of {cause}, {effect} happened.
If {cause}, then {effect}.