59.
Your Answer is
Correct Answer is D
Explanation
Item D: The most concise and clear.
Item A: over 1500 hours is the same as the previous 1680 hours.
Item B: 24-hour periods and days repeat.
Item C: Repeat continuous and nonstop.
59.
Your Answer is
Correct Answer is D
Explanation
Item D: The most concise and clear.
Item A: over 1500 hours is the same as the previous 1680 hours.
Item B: 24-hour periods and days repeat.
Item C: Repeat continuous and nonstop.