The following passage (paragraph 4) adds to the understanding of Biles's development mainly by——— She also didn't know how to control her immense power, often bounding up and back several feet after landing tumbling passes.
A- showing how unnecessarily harsh critics were toward Biles early on in her career
B- establishing what would be her signature tumbling technique throughout her Olympic run
C- suggesting how Biles took a weakness and turned it into one of her greatest assets
D- explaining why Biles would have to build a career without being able to perfect the balance beam