The answer is letter b, income and the wealth. The net worth is a way of having to measure the over all asset of the individual in which his or her income as well as his or her wealth that he or she has or acquires. The answer is letter b.
Spain was progressive and strong. It showed other countries that Spain was a leader
They use The Economic Analysis Method to assign an monetary value, because it is often difficult to assign a value. This approach ( The Economic Analysis Method) states that, the patents value is the replacement cost, or at least the right amount to replace the protection right on the invention.
I hope this answered your question! :^)