An Important Rule in Regard to the Negotiability of Cheques

An important rule in regard to the negotiability of cheques is that:

A) Some cheques are not subject to the nemo dat rule.They can be negotiated provided they are crossed with two parallel lines.
B) all cheques are subject to the nemo dat rule.
C) the nemo dat rule applies to cheques that are crossed 'not negotiable'.
D) no cheques are subject to the nemo dat rule.