Average velocity of movement of sugars in phloem is:

Explanation

The correct answer is "1 meter/hour" because studies have shown that the average velocity of sugar transport in the phloem is approximately 1 meter per hour. This rate allows for effective distribution of nutrients throughout the plant. Option A significantly underestimates the rate, making it impractical for plant function. Option B, while plausible under some conditions, generally underestimates typical rates. Option D suggests a much faster rate than is commonly observed, which can occur but is not the average.