Genetic Pathway Confusion

Im completely confused ! :/ any help would be great !

A lin-3 loss-of-function mutant with a vulva-less phenotype was mutagenized. Based on your knowledge of the genetic pathway, what types of mutations will suppress the vulva-less phenotype?

Check all that apply.

loss-of-function intracellular signal molecule (LET-60) activated by lin-3 mutants
loss-of-function lin-3 mutants
gain-of-function lin-3 receptor mutants
gain-of-function intracellular signal molecule (LET-60) activated by lin-3 mutants
loss-of-function lin-3 receptor mutants



In a complementary experiment, a gain-of-function let-23 mutant with a multi-vulva phenotype was also mutagenized. What types of mutations will suppress the multi-vulva phenotype?

Check all that apply.

loss-of-function lin-3 receptor mutants
gain-of-function lin-3 receptor mutants
loss-of-function intracellular signal molecule (LET-60) activated by lin-3 mutants
gain-of-function intracellular signal molecule (LET-60) activated by lin-3 mutants