PLEASE HELP! TIMED EXAM , explain the impact of the invasions by three major groups, muslims vikings and magyars, during the dark ages in europe

These invasiosn were able to deeply affect Europe politcally, socially, and economically leaving Europe in utter chaos. Many were scared to flee or distribute trades due to the impending fear of getting attacked and looted. Armies collapsed, and civillians were being terrorized.

.elections are held to determine who serves in congress.

answer; i believe the above statement is (true);