Answer: D technical skills
Czarnowski and Triantafyllou learned that boat propellers are not very efficient, except penguin propulsion systems.
Someone can install an operating system by disk or removable storage media.
Disk being floppy, tape or commonly a DVD.
Removable storage being a USBdrive.
The answer from the given option is "D", "<span>OSHA covers all categories of business and industry".
OSHA stands for </span>Occupational Safety and Health Administration, which is an agency of the United States Department of Labor. The four categories of business and industry that are covered by the standards are general industry, maritime, construction and agriculture. So the the answer from the given options is D, because a, b and c are included in the categories.