Recommended strategies of falling debris or fragments resulting from earthquake induced landslides​

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles

it would be c. predictability

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..