What is the effect of surface tension forces in the air-fill…

Whаt is the effect оf surfаce tensiоn fоrces in the аir-filled lung? 1. It increases the elastic recoil of the lung, promoting collapse. (increases elastance) 2. It makes the lung harder to inflate than if it were filled with fluid. (decreases compliance) 3. It decreases the lung's elasticity as volume increases. (decreases elastance)