Marta feels that sentence 5 needs parentheses. Which revision places them appropriately?
To compound matters, plastic never (completely) biodegrades, so the straws remain in the environment in one form or another
they eventually break down into deadly microplastics in horrifying perpetuity.
To compound matters, plastic never completely biodegrades, so the straws remain in the environment (in one form or another)
they eventually break down into deadly microplastics in horrifying perpetuity.
To compound matters, plastic never completely biodegrades, so the straws remain in the environment in one form or another
(they eventually break down into deadly microplastics) in horrifying perpetuity.
(To compound matters) plastic never completely biodegrades, so the straws remain in the environment in one form or another
they eventually break down into deadly microplastics in horrifying perpetuity.