Final answer:
The correct answer is A. Él jugaba con los fósforos. This sentence uses the imperfect tense to describe an ongoing or habitual action in the past.
Step-by-step explanation:
The correct answer is A. Él jugaba con los fósforos.
The imperfect tense is used to describe ongoing or habitual actions in the past. In this sentence, 'Él jugaba con los fósforos,' the imperfect tense is used to convey the idea that the person was playing with matches repeatedly or for a continuous period of time in the past.
On the other hand, option B 'Empezó un fuego grande' uses the preterite tense, which is used to indicate completed actions in the past. And option C 'Él fue al hospital' uses the preterite tense as well to indicate a specific event that happened in the past.
Learn more about Imperfect tense