The main points of the passage are:
1. People increasingly view idleness as sin and industriousness as a virtue, pushing them into meaningless jobs.
2. On the other hand, this has also saved us from many of life's drudgeries.
A: Misses out on point 1.
B: A distortion. The author does not advocate idleness. Also, 1 is not covered properly.
C: Incorrect. 'led to greater idleness' is not implied anywhere in the passage.
D: Covers both the points aptly and is the answer.