The correct answer is letter B: it rose a great deal.
After the military rule, Brazil faced an “economic boom”, which is also known as "economic miracle". The country's GDP grew significantly from 9,8% per year in 1968, to 14% per year in 1973.
Also, during this time, the Brazilian stock market went through a period that is seen by economists as the biggest growth Brazil has ever seen since the Proclamation of the Republic in Brazil.