Definition: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Input: [header] How to make a poster with picture collage maker pro [title] Download picture collage maker pro and install on the desktop. [step] Then you can apply it into full play. [title] Adjusting page size and choose background. <sep> (A) [title] Make sure select a photograph or group of images as you put them next to frame. [title] Then go to add to frame and put collage creator pro down. (B) [step] Click the collage button of the top toolbar, you'll catch a glimpse of collage panel setting and background setup. Open the collage panel setting, you can resize the collage as you want, the width, height, predefined and orientation are waiting for you to adjust. (C) [step] Hide file on image or add pancontrols in status bar. The default background will add blur to collage maker in windows. (D) [step] Change the width of the background to 390 so it is bigger then the width of the poster frame. Then select photo default shortcut in program center] picture cover] frame.
Output:
B