Answer:
A. Sacha coupe les pommes de terre et j'écrase l'ail.
Step-by-step explanation:
The sentence Sacha cuts the potatoes and I crush the garlic is the only sentence that correctly expresses the situation. She indicates that Sacha is responsible for cutting the potatoes and that Claire is responsible for crushing the garlic.
Sentence (B) is incorrect because it uses the plural for both actions, which suggests that Ash and Claire are doing both actions together.
Sentence (C) is incorrect because it uses the verb cut for both actions, which suggests that Sacha and Claire are doing the same action.
Sentence (D) is incorrect because it uses the verb ouir instead of cut or crush.