Who created shutter speed ? Thomas Sutton
Edwin H. Land
George Eastman
Eadweard muybridge

With the of an openoffice, sarah had to add a column chart in her math homework.

Net  the suffix is your .com/.net/.org, and so on, i believe

Iwould go with write exactly two extra paragraphs to point out additional information. but the keyword "exactly" throws me off. leads me to believe it's d. go with your gut feeling. either "write exactly two extra paragraphs" or "none of these".