The charge cloud of a single electron in a 2p, atomic orbital has two lobes of electron density.  This means

There is a high probability of locating the electron in a  $2p_x$ atomic orbital at values of x > 0

There is a great probability of finding a p electron right at the nucleus

There is a high probability of locating it values of x < 0 but no probability at alloy locating if any where in the yz plane along which x = 0.

Both (A) and (C)