Lithe in this sentence means, like, a small slender body. Lithe means slender or thin. "Although Amelia was slender or graceful, her sister was clumsy and awkward."
Your answer would be “ b “ !
Personally I would start with a quick warm up. Next, try paced run maxing out at 6:25's for a minute, then dropping back to 7:00 pace for 5 minutes before repeating.
