What is a group of cells that are similar in structure working together to perform a similar function? colony organ tissue organism

A group of cells that are similar in structure working together to perform a similar function is called tissue. A group of speciallized tissues is called an organ. There are four basic types of tissue in animals, they are: connective, muscles, nevours and epithelial tissues.

After some research on different sites, i got the same answer on all sites and they all said C) Tissue