The information in the sentence below tells us that the census takes place every __________.

The Constitution mandates a decennial census of the US population.

Ayear
Bten years
Ctwenty years
Dhundred years

Verified Answer :

The information in the sentence below tells us that the census takes place every "ten years," since in this case the word "decennial" means ten years. 

The Answer is B. Ten years