Success Event and Referrer

Hi there, 

May I ask:

In Workspace, by default, breakdown a success event by referrer or referrer type, will it credit to the last referrer ONLY?

For example:

Visit 1: Search from Google > Landing to Page A > Page B > Register (Event)

Visit 2: Search from Google > Landing to Page A > Click a link from external Social Media > Landing to Page B > Page C > Register (Event)

Visit 3: Search from Google > Page A > search from Yahoo > Page A > Register

Then, by default, if I break down Register Event by Referrer or Referrer Type, will I get:

Google: 1

Yahoo: 1

Social Media: 1

Referrer Type:

Organic Search: 2

Social Media: 1

Or Google will be credit 1 Register in Visit 1, AND will also be credit Register in Visit 2 and 3 by linear?

Thanks in advance.