Farming today in the U. S. is productivity compared to a century ago, resulting in there being farmers today than at the turn of the previous century.

d) much more fewer

Explanation:

Farming in the United States now employs large scale machinery to get the work done faster and more efficiently. As a result productivity has sky rocketed compared to a century ago and the contribution of Agriculture to US GDP is even higher than the entire GDP of some Countries such as Indonesia.

However, due to the large scale mechanisation involved as well as the diversification of the US economy, fewer people are farmers compared to a century ago with only 1.3% of employed Americans working in farms today.

750 h and costs $0.60 per bulb.