migrants regularly send remittances to their family
Option B.
Step-by-step explanation:
Migration is the process when people from one place move to the other place. Mostly the prime reason of shifting of people from one place to the other is in the search of work and better living opportunities which they might not find in their own countries.
People from developing or under developing countries move to the developed countries and keep sending money from there to their family members here, leading to increase in money flow in country of origin.