Which of These Haploid Strains Produce β-Galactosidase Constitutively but Do

Multiple Choice

Which of these haploid strains produce β-galactosidase constitutively but do not produce permease?

A) I- P+ O+ Z+ Y+
B) I+ P+ O+ Z- Y-
C) I- P+ O+ Z-Y+
D) I+ P+ O- Z+ Y+
E) I- P+ O+ Z+ Y-