Wiring Options for 14/3 NM-B Cable and Two Single Pole 15 Amp Circuit Breakers
(NB: All quotes here are from the 2014 NEC, but I know of no significant changes to these passages between 2014 and 2017.)

Methods 1 and 3 are fine...

For a 15A MWBC, both wiring method 1 and wiring method 3 will work and are Code-compliant as described, insofar as the receptacle wiring goes.

but Method 2 isnt...

Method 2, however, violates NEC 300.13(B) as described:


  (B) Device Removal. In multi wire branch circuits, the
  continuity of a grounded conductor shall not depend on
  device connections such as lampholders, receptacles, and
  so forth, where the removal of such devices would interrupt
  the continuity.


as removing the first receptacle of the circuit leaves the second receptacle sans neutral.  Fortunately, this mistake won't fry any equipment, but that's only because the second receptacle only gets the second leg's hot.

And all three of these need handle tying to be compliant

In any case, identified handle ties need to be used in order to provide the "common disconnecting means" required by 210.4(B):


  (B) Disconnecting Means. Each multiwire branch circuit
  shall be provided with a means that will simultaneously
  disconnect all ungrounded conductors at the point where
  the branch circuit originates.
  
  Informational Note: See 240.15(B) for information on the
  use of single-pole circuit breakers as the disconnecting means.


and 240.15(B) (specifically, 240.15(B)(1)):


  (B) Circuit Breaker as Overcurrent Device. Circuit
  breakers shall open all ungrounded conductors of the circuit
  both manually and automatically unless otherwise permitted in 240.15(B)(1), (B)(2), (B)(3), and (B)(4).
  
  (1) Multiwire Branch Circuits. Individual single-pole circuit breakers, with identified handle ties, shall be permitted
  as the protection for each ungrounded conductor of multi-wire branch circuits that serve only single-phase line-to-neutral loads.