Your network contains a server that has Microsoft SharePoint Foundation 2010 installed.
You create a new SharePoint site named Site1.
You have a group named Group1. You need to grant Group1 access to Site1.

Group1 must have the following permissions:

* Add Items
* Edit Items
* Approve Items

The solution must minimize the number of permissions assigned to Group1.

Which permission level should you assign to Group1?

A.
Contribute

B.
Design

C.
Full Control

D.
Read

Explanation:
Default permission levels
Permission levels are collections of permissions that allow users to perform a set of related tasks. SharePoint Foundation 2010 includes five permission levels by default. You can customize the permissions available in these permission levels (except for the Limited Access and Full Control permission levels), or you can create customized permission levels that contain only the permissions you need.

The following table lists the default permission levels for team sites in SharePoint Foundation 2010.

Source: http://technet.microsoft.com/en-us/library/cc288074.aspx