I believe the answer would be D: a current study on the effects of stress on the body published by a medical journal.
Hope this helps.
Answer:
The brave men, living and dead, who struggled here, have consecrated it,far above our poor power to add and detract
Explanation:
From the excerpt ,Abraham Lincoln acknowledge and argue that the outcome of the war will depend on lot of sacrifice,loyalty and commitment of northern citizens during the War.
The brave men, living and dead, who struggled here, have consecrated it,far above our poor power to add and detract