her time from start to finish the number of steps she took her heart rate at the finish line the direction she began running
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Marni runs 1500 meters around the school track. What does she need to know in order to find out her speed?
Possibilities:
- her time from start to finish
- the number of steps she took
- her heart rate at the finish line
- the direction she began running

her time from start to finish