15. Which two details support the author's claim that "releasing a balloon into the sky is really a kind
of littering"?

A. "You may have seen people release balloons into the air in celebration at events such as graduations and
weddings."

B. "Unfortunately, those balloons don't just vanish into thin air."

C. "Indeed, this litter isn't just ugly—it's also hazardous."

D. "Animals such as cows, sheep, birds, dogs, and turtles have been hurt by balloons because they have
mistaken a deflated balloon for food."

E. "During coastal cleanups, old balloons are commonly found along with plastic bottles and other trash."