Which of These Statements Is NOT a Consequence of the Postulates

Multiple Choice

Which of these statements is NOT a consequence of the postulates of special relativity?

A) The mass of an object moving with respect to an observer is larger than the mass measured by a different observer who is at rest with respect to the object.
B) A clock moving with respect to an observer ticks more slowly than when measured by an observer who is moving along with the clock.
C) The length of an object moving with respect to an observer is shorter than it is when measured by a different observer moving along with the object.
D) The wavelength emitted from a source moving with respect to an observer is different from the wavelength measured by an observer who is moving along with the source.