An altered cast impression technique for free-end extension mandibular partial denture cases is done primarily to
1. capture soft tissue in a supporting form.
2. capture the retromylohyoid area.
3. prevent displacement of the retromolar pad.
4. allow jaw relation records to be made simultaneously with impression making

(1) (2) (3)

(4) only

All of the above.

(2) and (4)

(1) and (3)