(a) At any point in the derivation, spell-out may be applied creating a new dimension in derivation leading to interface level PF
(b) If the ultimate representation reached at PF satisfies the interface condition of PF, the derivation is said to crash at PF
(c) If, on the other hand, it does not meet the interface conditions of PF, the derivation is said to converge at PF
(d) New lexical items cannot be inserted after a spell out.
Choose the correct answer from the options given below: