Asolid, rectangular block of material floats on water is it possible that the block is pure gold?

are there answer choices to this question? this seems like a question where you have options to choose from.

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