Brian Jenkins says that the six tactics of terrorism can be enhanced by force multipliers. In military terms, a force multiplier increases striking power without increasing the strength of a unit. He labels four kinds of force multipliers: Transnational support, Technology, Media coverage, and Religion. Terrorists routinely use force multipliers because they add to their aura. All political terrorists want to give the illusion that they can fight on a higher, more powerful level.
Terrorist cell members receive instructions from within the shelter of a local church. This scenario is an example of which force multiplier?
a. Media coverage
b. Religion
c. Transnational support
d. Technology

Transnational support  force multiplier

Explanation:

Under Transnational support  force multiplier terrorist groups provide a sort of  support structures which act as force multipliers where collaboration can serve as a force multiplier for both group and cell memebers where there is an support system and ideology to create terror.Example of Transnational support  is if a terrorist attack in the United States is perpetrated by terrorists from Iran, then the incident is one of transnational terrorism

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.