Selecting consecutive items in a circle

Imagine 12 objects arranged in a circular formation. Selecting a block of 10 consecutive things in a fixed clockwise direction is completely determined by choosing the starting point of that block.

Since there are exactly 12 distinct objects that can serve as the initial item for the clockwise group, there are exactly 12 unique blocks of 10 consecutive items. Alternatively, selecting 10 consecutive items in a circle is logically identical to choosing which 2 consecutive items are left behind; there are exactly 12 ways to select 2 adjacent items to drop from a ring of 12.

Answer: (c).