The most accurate response is:
The military was very powerful and the problems of ethnic minorities had a low priority among Burman voters.
Aung San Suu Kyi, despite being a democratic leader, had limited power over the military in Myanmar due to the country's political structure, where the military retained significant authority. As a result, the rights and issues of ethnic minorities, including the Rohingya, were often deprioritized in favor of maintaining the status quo and appeasing the military and the majority Burman population.