Which sentence uses the most precise language?

a. with so many steps in the instructions, we didn't know what to do next.
b. with multiple steps in the instruction manual, we were unsure of the solution when the wheel detached from the bicycle.
c. with so many steps in the instruction manual, we didn't know what to do after the wheel fell off the bike.
d. with many steps in the instructions, we were unsure of our next step after the wheel fell off the bicycle.