Answer:
B. Only if they are older than six-years-old
Explanation:
<u>This question would need to be more specific, in regards of which State are we talking about.</u>
<u>I'll try to answer this question in the more general way considering all the United States state's laws considering this matter in a general way. </u>
In the United States every state has different laws regarding leaving children unattended in the car. Some states state that the children must be older than 6 year old and some of them say that they must be older than 9 year old. Some states don't even have laws regarding this matter.
However, <u>NONE</u> of the states say that it is legal or okay to leave children younger than 6-years-old, they also don't say it's okay as long as the windows are rolled down or the keys are not in the car.
Therefore, the correct answer <u>would be b. since it's the only one that is mentioned in some state's laws such as Florida, Illinois or Louisiana. </u>