Punctuation Practice

If it is improperly introduced into the environment, acid-whey runoff can pollute waterways, depleting the oxygen content of streams and rivers as it decomposes.
A. NO CHANGE
B. can pollute waterway' s,
C. could have polluted waterways,
D. has polluted waterway' s,

Because consumers reap the nutritional benefits of Greek yogurt and support those who make and sell it, therefore farmers and businesses should continue finding safe and effective methods of producing the food.
A. NO CHANGE
B. it, farmers
C. it, so farmers
D. it: farmers

But Jason Box, an associate professor of geology at Ohio State believes that another factor added to the early thaw: the “dark snow” problem.
A. NO CHANGE
B. Box an associate professor of geology at Ohio State,
C. Box, an associate professor of geology at Ohio State,
D. Box, an associate professor of geology, at Ohio State

But Jason Box, an associate professor of geology at Ohio State, believes that another factor added to the early thaw; the “dark snow” problem.
A. NO CHANGE
B. thaw; and it was
C. thaw:
D. thaw: being

The spaces are usually stocked with standard office equipment, such as photocopiers, printers, and fax machines.
A. NO CHANGE
B. equipment, such as:
C. equipment such as:
D. equipment, such as,

Over time, I' ve gotten to know several of my coworking colleagues: another website developer, a graphic designer, a freelance writer, and several mobile app coders.
A. NO CHANGE
B. colleagues;
C. colleagues,
D. colleagues

For instance, I couldn' t wait to view painter, Georges Seurat' s, 10-foot-wide A Sunday Afternoon on the Island of La Grande Jatte in its full size.
A. NO CHANGE
B. painter, Georges Seurat' s
C. painter Georges Seurat' s,
D. painter Georges Seurat' s

It took me by surprise, then, when my favorite exhibit at the museum was one of it’s tiniest; the Thorne Miniature Rooms.
A. NO CHANGE
B. its tiniest;
C. its tiniest:
D. it' s tiniest,

A recent study by two professors at the University of California, Santa Cruz, Chris Wilmers and James Estes, suggests, that kelp forests protected by sea otters can absorb as much as twelve times the amount of carbon dioxide from the atmosphere as those where sea urchins are allowed to devour the kelp.
A. NO CHANGE
B. suggests— that
C. suggests, “that
D. suggests that

But they suggest that the presence of otters provides a good model of how carbon can be sequestered, or removed; from the atmosphere through the management of animal populations.
A. NO CHANGE
B. or removed from,
C. or, removed from,
D. or removed, from