quiz_data = []
current_question_index = [0]
score = [0]
user_answer = [None]

def reset_state():
    quiz_data.clear()
    current_question_index[0] = 0
    score[0] = 0
    user_answer[0] = None

def reset_user_answer():
    user_answer[0] = None

def set_user_answer(answer):
    user_answer[0] = answer

def increment_score():
    score[0] += 1

def increment_index():
    current_question_index[0] += 1