Answer:
The correct answer is D. decimal point. 
Explanation:
The question is wrong. It should be :
When converting from a smaller to a larger unit of measurement, you move the _______ to the left. 
In order to convert from a smaller to a larger unit of measurement what we need to move is the decimal point to the left. Let's see an example :
We have the two following units
''
'' which is grams and ''
'' which is kilograms.  
We know that the grams are a smaller unit of measurement that kilograms. 
We also know the relationship : 

For example if we want to convert 
 to kilograms :

What we have done is that we divided the number ''1500'' by ''1000''.
This is equal to move the decimal point three places to the left ⇒

The correct answer is D. decimal point