Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
|  | TOOL Device for measurement |  | DIMENSION Parameter the tool measures |  | OBJECTS Type of object being measured |  | UNIT Units the tool measures |
| --- | --- | --- | --- | --- | --- | --- | --- |
| A | pan balance; balance | is used to measure the | weight | of | solids | in units of | grams; kilograms; ounces; pounds |
| A | stopwatch | is used to measure the | time | of | events | in units of | seconds; minutes |
| A | calendar | is used to measure the | time | of | events | in units of | days; months; years |
| A | thermometer | is used to measure the | temperature | of | substances | in units of | Celsius; centigrade; Fahrenheit; Kelvin |
| A | graduated cylinder | is used to measure the | volume | of | liquids | in units of | milliliters; liters; quarts; gallons |
| A | tape measure | is used to measure the | length | of | solids | in units of | centimeters; meters; inches; feet |
| A | odometer; odograph | is used to measure the | length | of | paths; routes | in units of | kilometers; miles |
| A | odometer; odograph | is used to measure the | distance | of | paths; routes | in units of | kilometers; miles |
| A | calipers | is used to measure the | length | of | solids | in units of | centimeters; meters; inches; feet |
| A | barometer | is used to measure the | pressure | of | atmosphere | in units of | atmospheres; bars |
| A | ruler | is used to measure the | length | of | solids | in units of | centimeters; meters; inches; feet |
| A | scale; weighing scale | is used to measure the | weight | of | solids; liquids | in units of | grams; kilograms; ounces; pounds |
| A | accelerometer | is used to measure the | acceleration | of | solids | in units of | meters per second squared; g-force |
| A | calorimeter | is used to measure the | heat | of | chemical reactions; physical changes | in units of | joules per kelvin |
| A | altimeter; altitude meter | is used to measure the | altitude | of | solids | in units of | kilometers; miles |
| A | anemometer | is used to measure the | speed | of | wind | in units of | kilometers per hour; miles per hour |
| A | measuring cup; measuring jug | is used to measure the | volume | of | solids; liquids | in units of | ounces; milliliters; cups |
| A | micrometer; micrometer screw gauge | is used to measure the | length | of | solids | in units of | millimeters |
| A | protractor | is used to measure the | angles | of | lines; surfaces | in units of | degrees; radians |
| A | sextant | is used to measure the | angle | of | an astronomical object and the horizon | in units of | degrees |
| A | speedometer; speed meter | is used to measure the | speed | of | vehicles | in units of | kilometers per hour; miles per hour |
| A | tachometer; revolution-counter; tach; rev-counter; RPM gauge | is used to measure the | rotation speed | of | shafts; disks; motors | in units of | rotations per minute |
| A | wind vane; weather vane | is used to measure the | direction | of | wind | in units of | compass degrees |
Question:
"If you want to know the time, down to the last second, that an event took to happen, then you need what item?" Select the correct choice to answer the question or fill in the blank.
Choices:
(A) Odometer
(B) Stop Watch
(C) Accelerometer
(D) A scale
Answer:
(B) Stop Watch