Which combo features three soft tacos?

The option that features three soft tacos is indeed the one that directly specifies it in the name: the 3 Soft Tacos Combo. This combo clearly indicates that it includes three soft tacos, which is the key characteristic that differentiates it from other combos in the list.

The other options refer to variations that are distinctly different, either featuring crunchy tacos or burritos, thus not aligning with the requirement of having soft tacos specifically. Consequently, when looking for a combo that offers three soft tacos, the 3 Soft Tacos Combo is the correct and straightforward choice.