Gierut's (1992) Treatment of the Empty Set Approach

Gierut's (1992) treatment of the empty set approach:

A) pairs two maximally contrastive singleton phonemes unknown to a child in novel words.
B) pairs one known phoneme with another unknown but maximally contrastive singleton phoneme in novel words.
C) uses homonymy facilitate communication breakdown and repair sequences.
D) starts with spontaneous production rather than imitation.