At the beginning of the school year, Lisa’s goal was to earn an A on at least 80 \% of her 50 quizzes for the year. She earned an A on 22 of the first 30 quizzes. If she is to achieve her goal, on at most how many of the remaining quizzes can she earn a grade lower than an \mathrm{A} ?
Answer Choices
A. 1
B. 2
C. 3
D. 4
E. 5