"Great Pacific Garbage Patch"
by Nsikan Akpan
. . . The Great Pacific Garbage Patch stretches across 617,000 square miles of the northern Pacific Ocean, based on their survey, and plastics make up 99.9 percent of the trash in the patch.
And while 1.8 trillion pieces of plastic might seem extraordinary, oceanographer Laurent Lebreton of The Ocean Cleanup foundation said the composition of the Great Pacific Garbage Patch is the noteworthy takeaway. While microplastics made up 94 percent of the total number of pieces of plastic in the patch, they only accounted for 8 percent of the mass.
That means the overwhelming bulk of the Great Pacific Garbage Patch is large pieces of trash. Most are hard plastics — think plastic food containers, bottles, lids, buckets, ropes and lots of fishing nets. Fishing nets made up nearly half the plastic discovered.
Use the excerpt from the “Great Pacific Garbage Patch weighs more than 43,000 cars and is much larger than we thought” article to answer the question.
Which matter is left uncertain by the excerpt?
A) which types of materials make up the garbage patch
B) how the plastics are finding their way into the ocean
C) where most of the trash is manufactured
D) how much area the garbage patch covers