Richard

Asked: 2016-07-28 00:37:57 +0800 CST2016-07-28 00:37:57 +0800 CST 2016-07-28 00:37:57 +0800 CST

What option do I choose for this update?

My Ubuntu software thingy asked me to update, then presented me with this intimidating choice. Which one is correct? Why is it asking me this?