Answer:
Step-by-step explanation:
1, It's a fragment. It does answer the question of where, but it is not a complete thought. You would need something like Over by the new sports field is a house that was built in 1894.
2. My friends and I decided to race. It should be decided, and it should have a period.
3. How long will it take to run a mile? That's a question.
4. My friend's new sneakers (fragment) are purple.
5. That was my best time ever. (requires a period or an exclamation mark.)
B cannot be answered without know what comes after whether.