Choose the word which is stressed differently from the rest: enjoy, suffer, study, differ

A. enjoy /ɪnˈdʒɔɪ/

B. suffer /ˈsʌfə(r)/

C. study /ˈstʌdi/

D. differ /ˈdɪfə(r)/

Sentence A has the stress on syllable 2, the rest is on syllable 1 .

The answer to choose is: A