Why did invaders had difficulty conquering egypt

Gupta kings believed the strict social order of the hindu caste system would strengthen their rule. which of the following responses to this statement is most logical? a. the guptas’ highest priority was preserving their power. b. the guptas’ highest priority was restoring personal freedoms. c. the guptas’ highest priority was spreading the hindu religion. d. the guptas’ highest priority was changing the roles of women.