The correct answer to this open question is the following.
Although there are no options attached we can say the following.
What happened when protesters in Syria stood up against the president was that the army repelled the protest with violent aggressions.
Sad but true. The government of Syria turned what first were pacific protests into a civil war that has severely damage the country and is the reason why thousands of people had decided to immigrate, creating an international migration crisis in the Middle East.
The original idea of the Syrian people was to peacefully take the streets to protest for better living conditions and democracy, as part of the events during the so-called "Arab Spring" of 2011. However, President Bashar al-Assad ordered to aggressively repel the protest, and since that day, the thing became horrible in places such as Aleppo, and many more.
Muslim countries such as Tunisia, Egypt, Syria, Morocco, and Libya took the streets in the Spring of 2011 to protest against their governments, demanding political changes that allowed people more freedom and better living opportunities. For instance, the protest in Egypt was so big that they could end with the dictator that governed Egypt for years, Hosni Mubarak.
Unfortunately in Syria, something very different happened.