Read the excerpt from "Tools of the Spymaster." General Gates's troops held their ground. Benedict Arnold, one of Gates's generals, argued for a counterattack that would smash the British force. Gates, outraged that Arnold would challenge his order, took away his command. But the rash Arnold saw a chance to strike a crucial blow. He galloped through the crossfire of both armies, inspiring his men. A bullet struck his leg, but he rode on, leading the final assault that shattered the British fortifications. If he had died of his wounds that day, Arnold would be remembered as one of the great heroes of the Revolutionary War. The author’s main purpose in this excerpt is to

She took up a scalpel and slit the monkey's abdomen, making a slow and gentle cut, keeping the blade well away from her gloved fingers. the spleen was puffed up and tough, leathery, like a globe of smoked salami. she did not see any bloody lesions inside this monkey. she had expected that the monkey's interior would be a lake of blood, but no, this monkey looked all right, it had not bled into itself. if the animal had died of ebola, this was not a clear case. she opened up the intestine. there was no blood inside it. the gut looked okay. then she examined the stomach. there she found a ring of bleeding spots at the junction between the stomach and the small intestine. this could be a sign of ebola, but it was not a clear sign. it could also be a sign of simian fever, not ebola. therefore, she could not confirm the presence of ebola virus in this animal based on a visual inspection of the internal organs during necropsy.