Answer: The answer is a) true.
Explanation: Underemployment is a measure of a employment and labor utilization in a country in terms of skills set, work experience and availability to work. There are varying types of underemployment but the one Jonas is suffering from is called invisible underemployment - he could not find a job relating to his field, a such his skill set could not be utilized though he is employed and would be paid lower than what he is worth in the industry.