Diocletian and constantine paved the way for foreign invasion by doing all of the following
a. dividing the empire
c. expanding civil services
b. creating administrative bureaucracies
d. reorganizing the military

The correct answer that would best complete the given statement above would be option B. EXPANDING CIVIL SERVICES. Diocletian and Constantine paved the way for foreign invasion by dividing the empire, creating administrative bureaucracies and reorganizing the military, except for expanding civil services. Hope this answer helps.