Answer:
A. Julia corta las papas y yo machaco el ajo.
Step-by-step explanation:
The sentence translation is “Julia slices potatoes and I crush the garlic.” This option is the correct answer because it is accurate and specific: With this sentence, Emily can communicate her grandmother exactly what each of them is doing.
The other options, on the other hand, are incorrect because sentence B does not specify the activities that each of the girls are doing, sentence C is wrong because Emily is not “adding” (“añadir”) the garlic, she is crushing it (“machacar”), and lastly, sentence D is also wrong because the girls are not actually cooking (“cocinando”) yet.