Answer the following question given this paragraph: 

The standard unit for mass is the kilogram . The kilogram's standard is a block of platinum-iridium metal kept near Paris, France. Other countries, of course, keep copies. A kilogram is denoted "kg" and is a multiple of the smaller unit of mass, the gram ("g").


Q: What is the standard unit for mass?

 Choices:

- ounce

- meter

- pound

- kilogram

A:
kilogram
