Wastewater from chemical factories has been turning the river magenta and bright orange. When oil spills occur, the water is
coated with a greasy sheen, and ugly yellow bubbles seem to
blister its surface. In many areas, sewage from factories and towns
flows directly into the river. In some places, the water is too
polluted to use for irrigation. Farmers have even reported animals
dying shortly after drinking from the river. These two problems,
overuse and pollution, actually magnify each other. When water
levels decrease, there is not enough water movement to clear the
pollution, which then builds up in greater and more dangerous
concentrations.
B
А
Wastewater from chemical factories has been turning the river magenta
and bright orange.
Farmers have even reported animals dying shortly after drinking from the
river.
C These two problems, overuse and pollution, actually magnify each other.
D In many areas, sewage from factories and towns flows directly into the
river.

Read the rough draft of a student's conclusion to anargumentative editorial.(1) year-round schooling would student achievement.(2) not so much information would have to be crammed intonine months. (3) furthermore, the elimination of long breaks,particularly summer break, would significantly reduce"learning loss" and the additional time wasted at thebeginning of each academic year to reteach previouslylearned material. (4) it is clear that year-round schooling students learn and retain more. (5) the united staleis not the only country to experiment with a year-roundschool schedule. (6) although many still claim that evidenceabout year-round school and its link to higher achievement isinconclusive, these people need to open their eyes and seethat students in these schools consistently score higher oncertain assessments than students who attend schools withtraditional nine-month calendars. (7) it is about time that wereplaced our outdated and inefficient school calendars.which best revises sentence 6 to create a more appropriate and respectful tone