Which of the following methods does split horizon use to reduce incorrect routing information?

Routing updates are split in half to reduce the update time.
Information learned from one sourceis not distributed back to that source.
New route information must be learned from multiple sources to be accepted.
The time between updates is split in half to speed convergence.
New route information is suppressed until the system hasconverged.

ccna exploration 2 chapter 4 Exam Question And Answers 

Which of the following methods does split horizon use to reduce incorrect routing information?