Respuesta :
The correct answer to this question is letter " c. elena walked to the store and bought some milk."
The original sentence is
Elena is walking to the store and bought some milk
When it is revised, the sentence should be
Elena walked to the store and bought some milk.
The original sentence is
Elena is walking to the store and bought some milk
When it is revised, the sentence should be
Elena walked to the store and bought some milk.
The sentence that is rewritten in order to make it parallel is: Elena walked to the store and bought some milk. The correct answer is option C. Since this sentence contains a compound verb, both verbs should be in the same tense, in which, this sentence contained both past form of the verb.