According to the passage, which of the following words means the opposite of 'complicated'?

Directions: Read the following passage and answer the question that follows.

Everybody doesn’t know how to make pizza, though most people love to eat it.
Making the perfect pizza can be complicated, but there are a lot of ways for you to make a more basic version at home. The easiest is to buy the crust from the market rather than making it at home as the crust is the most difficult to prepare. Most of the time, we cannot get the right consistency. Though, you can make it yourself also. After the crust, is the sauce, which is a little easier to make. You have to buy tomatoes, peel them, and then cook them with spices. It is not that difficult if you can manage the right flavour. Now that you have your crust and your sauce, you need to add the cheese. You should know how to turn milk into cheese. If not, you might want to buy cheese from the grocery store instead of making it yourself. All that is left at the end is the toppings which can be a person's own choice.