Dressed here is a verb. It’s the action of getting dressed. Here they are saying that they got dressed as though they had all week to get to school. Another way of saying that is that they “had all the time in the world.” This means they took their sweet time getting dressed, didn’t rush, and maybe even took too long. Basically it means that they got dressed very slowly, as if they weren’t in any rush to get to school.
Option 2 Is the thesis statement because it is located in the introductions and it talks about what we are going to read in the subsequent paragraphs. In the conclusion, Option 5 restates the thesis to help us recap on what we have read.