Помогите,пожалуйста.a,b,c

A) 1. This 2. These 3. This 4. These 5. Those 6. That B) 1. This 2. These 3. This, it 4. These, they 5. These C) 1. That 2. Those 3. Those, they 4. That, it 5. Those, they 2 And But But Because But So So But Because