What were the British allowed to do, due to the writs of assistance?

They were documents which served as a general search warrant that allowed customs officials to enter any ship or building that they suspected for any reason might hold smuggled goods.

Explanation:

This violated the colonists natural rights; it created issues with their rights for private property and they didn't feel secure in their homes. It gave the officials the opportunity to abuse the system and harass the colonists.

answer; the federal reserve system;