Hey lassie. Here are your answers for these questions.
Question one answer: A. Tarik repaired the tired on his bicycle, and he took it for a ride.
Question two answer: I do believe your answer is D. After carefully measuring the amount, the hypothesized that the large increase in weight was due to a natural process.
If the second one is wrong, I do apologize! That one seems most accurate for this cause.
Hope this helps!