I,Choose the words whose stress pattern isn't the same as that of the others:
1.A.Character B.regularly C.measure D.selection
2.A.mixture B.detective C.improve D.rehearse
3.A.geography B.chemistry C.history D.difference
4.A.overseas B.souvenir C.vacation D.campaign
5.A.temperature B.contestant C.skateboarding D.hygiene