They are efficient for rare diseases or diseases with a long latency period between exposure and disease manifestation.
Answer:
2. The Americans, with French help, defeated the British at Yorktown
Explanation:
The Americans and French surrounded the British and forced them into surrendering which is considered a victory.
Answer:
Amir was 12 years old when he recalls an event that occurred in 1975. So the answer would be 1975.
Explanation: