Some researchers have proposed that the Brachiosaurus, a massive dinosaur, was capable of running swiftly. However, this seems improbable, as running would likely have caused severe injuries to Brachiosaurus's legs. Studies on contemporary bones indicate the maximum stress they can endure before fracturing. By analyzing the thickness and weight of Brachiosaurus leg bones, it can be determined that those bones could not have handled the stresses of running.

Which of the following best summarizes the conclusion drawn by the argument as a whole?