Which of the following lines from the poem “To Be of Use” best conveys the connotation that hard work is associated with dignity and gratification?

A. “They seem to become natives of that element,”
B. “I love people who harness themselves, an ox to a heavy cart,”
C. “The work of the world is common as mud.”
D. “Botched, it smears the hands, crumbles to dust.”

B. “I love people who harness themselves, an ox to a heavy cart,” conveys the connotation that hard work is associated with dignity and gratification.

The line from the poem "To Be of Use" that best conveys the connotation that hard work is associated with dignity and gratification is:

B. "I love people who harness themselves, an ox to a heavy cart."

This line suggests that individuals who dedicate themselves to hard work and put in effort, comparing themselves to an ox pulling a heavy load, are highly respected and admired. It implies that hard work brings a sense of purpose, dignity, and fulfillment.