In case of couple where the male is having a very low sperm count, which technique will be suitable for fertilization?

In case of couple where the male is having a very low sperm count, which technique will be suitable for fertilization?

Option 1 : Intracytoplasmic sperm injection
Option 2 : GIFT (Gamete Intracytoplasmic)
Option 3 : Artificial insemination
Option 4 : Intrauterine transfer