Primary sources are sources that are reliable and that were written from someone that was alive and presenced the event. Your answer would be D!
Have a nice day! :)
Answer:
d. Launch of soviet satellite sputnik
Explanation:
Churchill was an effective leader and statesman because of his tremendous ability to inspire people; his unique strategic insight; his relentless passion; and his imperturbable personality.
President Lincoln was assassinated at the Ford Theatre :)