The correct answer is A. Ellos hicieron un suéter.
Explanation:
The past tense, or simple past tense, of the indicative is used in Spanish to express actions that began and ended in the past and took place in a timely manner or in a limited time space, or that interrupted another course of action also past and that It is expressed in the past imperfect.
Example:
El año pasado LLEGÓ una chica nueva a clase. Era china, de Pekín. Con un mapa nos EXPLICÓ todo sobre su país y su ciudad.
1. take the suitcase up 2. slow down 3. pay the toll 4. write the directions 5. wait for Juan 6. give me the plane(im not so sure of this one) 7. pass me the bread rolls 8. give me the money back