What is the value of 1+2+3−4+5+6+7−8+⋯+197+198+199−200?1+2+3-4+5+6+7-8+\cdots+197+198+199-200?1+2+3−4+5+6+7−8+⋯+197+198+199−200? A9,8009{,}8009,800B9,9009{,}9009,900C10,00010{,}00010,000D10,10010{,}10010,100E10,20010{,}20010,200