which of the following was a major factor in the decline of the byzantine empire

A: conversion of the Slavs
B: iconoclasm
C: arrival of invaders
D: recapture of rome

C: arrival of invaders

The decline of the Byzantine Empire was largely due to constant invasions and attacks from various groups, including the Seljuk Turks, the Ottoman Turks, and the Fourth Crusade. These invasions weakened the Byzantine Empire's military and economic power, leading to its eventual downfall.