Question

which contributed to the spread of domestic terrorism?
improved methods for recruiting new members
declining economies in various developing countries
civilian unrest due to government - enforced restrictions
colonial groups seeking independence from imperialistic powers

Explanation:

Improved recruitment methods can lead to more people joining domestic - terrorist groups, thus facilitating the spread of domestic terrorism. Declining economies in developing countries may not directly contribute to domestic terrorism within a single country. Civilian unrest due to government - enforced restrictions can sometimes lead to more complex social situations but is not as directly related to the spread of domestic terrorism as recruitment. Colonial groups seeking independence from imperialistic powers are more related to international or anti - colonial struggles rather than domestic terrorism.

Answer:

improved methods for recruiting new members