The answer is <span>Nikolaus Otto.
The four-stroke cycle was patented in 1862 by the German inventor Nikolaus Otto. This gas engine later on came to be a huge success.
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They help the soldiers and treated the wounded
B. And C. are the correct ones
Roosevelt revolutionized the U.S. Presidency. Many credit him with establishing the modern presidency. Speaking softly and carrying a big stick meant that American power was to be respected in domestic and international contexts. As president, he was a negotiator and peace maker as demonstrated in his successful negotiation of the Russo-Japanese War (1905), for which he won the Nobel Peace Prize. He also played an important role in Progressive Era Reforms such as the Pure Food and Drug Act.
Explanation:
this isn't specific at all
