Which of these is an advantage of Manchester Encoding?

Which of these is an advantage of Manchester Encoding?

• It uses less bits than the original signal
• It is named after an English City
• Very easy to understand
• The signal is self-synchronizing 

EXPLANATION

"In data transmission, Manchester encoding is a form of digital encoding in which data bits are represented by transitions from one logical state to the other. This is different from the more common method of encoding, in which a bit is represented by either a high state such as +5 volts or a low state such as 0 volts".
"The chief advantage of Manchester Encoding is the fact that the signal synchronizes itself." (See link for further reading).

http://searchnetworking.techtarget.com/definition/Manchester-encoding