how hard is Calc BC after having taken Calc AB?

<p>Okay so I'm going into my senior year and plan to take Calc BC. I took Calc AB last year and got B's both semesters and got a 5 on the AP test. BUT the entire year, I struggled alot and almost got a C my first semester. How hard should BC Calc be after AB Calc? I just need to get an A or a B my first semester and then I really don't care about my second semester grade. Thanks so much!</p>