When u are watching it u can see what's actually going on. When ppl read a speech it usually comes what they want to change. If u thought a wrong thing as peach can change your understanding. That's all ik
I had an English teacher like this once. She was notorious for giving students grades off the rubric. (Such as a grade below 30 even though the lowest grade on the rubric was 60). I recommend talking to your principal, parent or another teacher regarding this.
A is the correct answer because you don't want all the supporting details, why would you put it into someone else's words, and the reader of your summary won't understand it if you put it into incomplete thoughts.