Which of the following statements is wrong according to the passage
选项：

A:a. The amount of money sent home by migrant workers to their families in Latin America has reached more than $62 billion.
B:b. The number of the money could surplus $100 billion in four years’ time.
C:c. The combined total of all direct foreign investment and foreign aid to Latin America is less than all the remittances by the migrant workers.
D:d. The money will increase at an annual rate of 20%.