Which relationship most likely reflects both correlation and causation?

Responses

In hotels, washing more sheets is associated with using more water.
In hotels, washing more sheets is associated with using more water.

In a drive-thru car wash, the more vacuums that are in use is associated with using more water.
In a drive-thru car wash, the more vacuums that are in use is associated with using more water.

In restaurants, washing more dishes is associated with cleaning more toilets.
In restaurants, washing more dishes is associated with cleaning more toilets.

In coffee shops, washing more mugs is associated with greeting more customers.

In coffee shops, washing more mugs is associated with greeting more customers.