Task: Text Completion
Input (English): [header] How to measure your truck bed [title] Measure your truck bed's length with the tailgate closed. [step] Have a friend help you stretch a tape measure from the front left corner to the back left corner of your truck bed, on the inside. The tape measure should be running in a straight line that's even with the top of the bed (make sure it isn't sagging in the middle). <sep> (A) Then, lean forward slightly and consult with your friend. [substeps] The tape measure will measure 3 feet (. (B) Write this measurement down and label it " length. " [title] Find the width of your truck bed. (C) [title] Lie on your back with your feet on the floor. [step] Stand up as straight as possible with your feet on the ground. (D) Fold the tape measure up to the bump on the right side of the truck's headboard. [substeps] Be sure you can no longer see the bump.
Output (English): B