DIRECTIONS: Read the passage given below and answer the questions that follow. Passage-2 The smallest time interval that can be measured with commonly available clocks and watches is one second. However now special clocks are available that can measure time intervals smaller than a second. Some of these can measure time intervals as small as one millionth or even one billionth of a second. The time measuring devices used in sports can measure time intervals of

• A. a mille second 
• B. a micro second
• C. a nano second
• D. none of these