[sharbeldam]

a) CH3NHCH3 Or CH3NHC6H5
b) NaOH or C6H5NH2
c) CH3OCH3 or (CH3)3N

my attempt:
a) 1 because of the resonance structures of the second molecule.
b) i decided it's naoh because H2O is a weaker acid than NR3H+ ?
c) amines are stronger bases than ethers, not sure why

[spirochete]

You could solve "C" in the same way you solved "B". Or, you could look at trends in the periodic table. When comparing atoms in the same row of periodic table, the less electronegative atom is less acidic and has a more basic conjugate base.