Final answer:
In the 1970s, the Jamaat from Mozambique migrated to Portugal in response to political changes and conflicts within the country.
Step-by-step explanation:
In the 1970s, the Jamaat migrated from Mozambique due to political changes and conflicts. The country was struggling with the transition from being a colony to an independent nation and descended into a violent civil war that lasted from 1977 to 1992. The Jamaat who migrated from Mozambique during these tumultuous times found refuge in Portugal (b), as it was the former colonial power which held onto its colonies longer than other European nations and had significant ties with the people from its former colonies, including those who had moved there for work or education during the colonial period.