Помогите избрать ответ.11. 039;John crashed his car yesterday.039;039;I know, but if

Помогите избрать ответ.
11. 'John crashed his car yesterday.'
'I know, but if he hadn't been changing the cassette, he .......................... '
A won't crash B wouldn't crash C wouldn't have crashed

12. 'Can I have some chocolate, please?'
'If you behave yourself, I ..................... you some later.'
A would buy B might buy C buy

13. 'Should you see Colin ......................... and tell me.'
'I will.'
A come B to come C will come

14. 'If we were rich, we ..................... expensive clothes.'
'Well, unfortunately we aren't rich!'
A could afford B can afford C afford